How to log in to Membo | Differences between email, Google, Apple, and Facebook, and what to do if you can't log in.

1. Conclusion first: There are four entry points. If you use the same email address, it will be consolidated into one account.

Whether you're responding to a band member recruitment post or posting your own, the first hurdle is registration and login. If you get stuck here, you'll be exhausted before you even get a chance to contact the band.

This article organizes the registration and login methods for Membo , following the names displayed on the screen. It also summarizes what to check if you encounter login problems. This is the eighth article in our "How to Use" series. The parts that can be used without registration are covered in the fourth article, which discusses guest access and registration requirements . This article focuses specifically on "how to register and log in" and "what to do if you can't log in."

To get straight to the point, the authentication screen has four entry points: email address, Google, Facebook, and Apple. From the program, it appears that users who register with an email address, or those who log in with Google or other services, will all be combined into a single account if they use the same email address. A "guest mode" for viewing without registering can also be selected from the same screen.

However, this article only covers what I was able to verify by reading the screen layout and the displayed text. I confirmed that logging in via the Apple button worked on November 10, 2026. This is not a record of demonstrating each other method from start to finish. Things I haven't verified are summarized in the later chapters.

2. Look at the buttons on the authentication screen in order.

If you open Membo and are not already logged in, an authentication screen will appear. Looking at the screen layout, in Japanese, the following buttons and links are arranged from top to bottom.

1. "Sign up with Email" : Button for registering a new account using an email address.
2. "Already registered? Login" : A link to open the login screen for people who have already registered.
3. "Sign up/Login with Google"
4. "Sign up/Login with Facebook"
5. "Sign up/Login with Apple"
6. "Browse only without registration (Guest Mode)"
7. "Change Language" : A globe icon. This is the entry point for switching languages; the display remains in English.

The button to register via email and the link to log in via email are in different locations. The fact that "Register" and "Login" are not the same button is where people often get confused at first. If you have already registered, please log in using the second option, "Already registered? Login."

The Google, Facebook, and Apple buttons are labeled "Register/Login." These buttons serve both the initial registration and subsequent logins.

Note that this screen is generated and displayed by the program when you open the Membo page. The original source code of the page does not contain any buttons.

3. Create a table showing the differences between the four methods.

All four entry points lead to Membo . The differences lie in the entry procedure and the prerequisites. Based on what can be gleaned from the screen layout, I've summarized them in a table.

Registering with an email address allows you to choose your own password. Google, Facebook, and Apple, on the other hand, verify your identity through their respective services. The point of this article isn't which is better, but rather to choose based on whether you prefer to manage your own password or use an existing account.

There's one thing to keep in mind: it's a good idea to remember the method you used to log in so you can recall it later. We'll look at each method in detail in the following chapters.

4. Register with your email address: 3 steps

Clicking "Sign up with Email" will take you through a three-step registration process.

1. Enter your email address : Enter the same email address in both the "Email Address" and "Confirm Email Address" fields. If the two match, it will be highlighted in green. Then, press "Send Verification Email".
2. Enter the verification code : You will see a screen that says, "Please check your email and enter the verification code." Enter the 6-digit number written in the email you received into the "6-digit verification code" field and press "Verify."
3. To set a password : On the "Set Password" screen, enter your "New Password" and "Confirm Password," then press "Complete Setup."

Please enter your email address again in the confirmation field. The field will turn green when the two entries are the same. This field is for catching typos, so it's recommended to type it again and compare it rather than copying and pasting.

The verification code is a 6-digit number. Only numbers can be entered in the input field. If there are not enough digits, a message will appear saying, "Please enter ○ more digits."

The code is valid for 24 hours. This number won't appear on the screen, but in theory, it's valid for 24 hours after it's sent. When it expires, you'll see a message saying, "Verification code has expired." If you enter the wrong code, you'll see, "Invalid verification code." In either case, you can receive a new code by using the "resend" function described in a later chapter.

On the password setting screen, there is a checkbox labeled "Receive updates and announcements from Membo." It is initially displayed as "on." If you do not want to receive notification emails, you can uncheck it here.

There's one more thing that's easy to overlook. There's no field to enter your name during registration. You enter your name after you've finished registering, when you edit your profile. I've summarized the profile fields in the third article on how to create a profile .

5. How to choose a password

The requirements on the password screen are as follows:

If the conditions are not met, a message will be displayed such as, "Please enter a password that is between ○ and ○ characters long," or "Please enter a password using half-width alphanumeric characters and symbols."

Japanese characters and full-width alphanumeric characters cannot be used. When entering on a smartphone, you may accidentally enter full-width characters, which may result in a message indicating that the conditions are not met. Please switch your input method to half-width before entering.

These conditions are verified on the screen side. This article does not cover the server-side conditions. Assuming that the screen verification will pass as long as you specify a string of 8 or more alphanumeric characters and symbols, it should work.

Another way to manage your passwords is to use the password saving function of your browser or smartphone. This is a function of your device or browser, not a Membo function. Whether or not you use it is up to your own judgment.

6. For subsequent logins, log in using your email address and password.

After completing registration, the next time you open the site, if the login screen appears, click the "Already registered? Login" link. The following will appear on the login screen:

• Headlines: "Login" and "Login to your account"
• Instructions: "Enter your email and password."
• Email address and password input fields
• Button "Login"
• Link: "Change login method"
• Link: "Forgot Password?"

The "Login" button cannot be pressed until your email address is correct and your password is at least 6 characters long. Once the input is correct, you will be able to press the button. While registration required a minimum of 8 characters, the login screen only requires a minimum of 6 characters. Since registered users have already chosen a password of 8 characters or more, this shouldn't cause any problems.

Upon successful login, the page will automatically reload. The screen may briefly change, but this is not a malfunction.

Please note that there is no "Keep me logged in" checkbox on the screen. There is no option to check or uncheck this box.

Clicking "Change login method" will return you to the initial screen with the four entry points. This is useful if you intended to log in with your email address but now want to log in with Google.

7. About the Google, Facebook, and Apple buttons

The three buttons, "Sign up/Login with Google," "Sign up/Login with Facebook," and "Sign up/Login with Apple," lead you to the login screen for each respective service. When you open Membo on a computer or smartphone browser, clicking a button will take you through the Membo server to the confirmation screen for that service.

Once verification is complete, you will be returned to the Membo screen and the home page will open. You will not be prompted to enter a password on the Membo side.

Google uses your profile and email address information, Facebook uses your email address and public profile information, and Apple uses your email address and name information. When a confirmation screen appears on each service, please read the content before proceeding.

As mentioned at the beginning, I have confirmed that logging in via the button works for Apple. For Google and Facebook, the only things I have confirmed in this article are that there is a button and that there is a mechanism to consolidate emails into one, which I will write about in the next chapter.

Apple has issued official instructions regarding "Sign in with Apple." These instructions include information on how to manage the apps you use, so reading them will give you peace of mind.

Manage apps that use "Sign in with Apple" (Apple Support)

Google Help provides detailed information about two-factor authentication and verification codes for your Google account. This is helpful when you want to enhance the security of your Google account itself.

Enable 2-Step Verification (Google Account Help)

8. If you use the same email address, it will be consolidated into one account.

When considering registration and login methods, a common concern is whether logging in with Google after registering via email will result in a separate account.

Upon closer examination, the email address serves as a common identifier. A table illustrating the different methods for finding it is provided below.

In other words, if someone registers using an email address and then logs in with the same email address's Google account, it won't create a new account; it will log back into the original account. When registering with an email address, if another account has been created using the same email address, it will be determined that the account is "already registered."

This "combining" mechanism relies on each service providing its email address to Membo . If an email address is not provided, the accounts will not be linked and will be created as new accounts.

I haven't actually tested both methods consecutively on a real device to verify this. This is just a discussion based on how the mechanism seems to work. If you're unsure which method was used to create your account, try the method you usually use most often.

With that in mind, here's one practical piece of advice: The easiest way to avoid confusion is to stick with the method you initially used. If you want to change methods, try checking if you can log in with the same email address when you have some time.

9. When it is open within LINE or Instagram

This is an easily overlooked point. When you open a link within apps like LINE, Facebook, Instagram, Twitter, and Snapchat, Membo opens in the app's built-in browser.

In this state, if you click "Sign up/log in with Google" or "Sign up/log in with Facebook," the following warning will appear.

This login method is not available in the in-app browser. Please open it in Safari/Chrome from the menu in the upper right or lower right corner.

As the warning states, you can proceed with logging in by reopening the app from the in-app menu using a regular browser such as Safari or Chrome. This check applies to the Google and Facebook buttons. Apple and email addresses are not included in this warning (we haven't verified whether you can log in completely within social media).

If you're having trouble logging in after opening a link on social media, this is the first thing to suspect. Sometimes, simply reopening the link in a regular browser can solve the problem.

Instructions on how to add it to your home screen are provided on the Membo app installation page , with details specific to your device model.

10. "Guest Mode" - for viewing without registration.

By clicking "Browse only without registration (Guest Mode)" on the authentication screen, you can browse Membo without registering or logging in. If you have already selected a language, the home page will open directly.

As a guest, you will be prompted to register or log in for several operations, including My Page, Favorites, Messages, Posting Job Listings, Music/Videos, Notification Settings, and Security Settings. Clicking will bring up the following confirmation.

• Headline: "Login required"
• Text: "You need to register or login to use this feature."
• Button: "Sign up/Login"

Clicking "Sign up/Login" will remove your guest status and return you to the authentication screen. From here, you can proceed using one of the four entry points described earlier.

I've summarized what you can and can't do as a guest in the fourth guest article . You can start searching for jobs without registering. For how to search, please read the first article on how to find jobs , for your favorites, please read the second article on favorites , and for the map, please read the fifth article on maps .

11. Messages that appear when you cannot log in, and how to check them.

If you're unable to log in, the text displayed on the screen can provide clues. We've created a table showing the text you can glean from the screen layout and where to check it.

A common message you might encounter when you can't log in is, "Invalid email or password." This message appears not only when the password is wrong, but also when there is no account associated with that email address. The screen is designed in such a way that it's difficult to distinguish what's wrong.

Please double-check both your email address and password for any typos. If both are correct but you still can't log in, try the following steps in order.

If you see this message, please check the following in order.

1. Typo in email address : Is it the same email address you used when registering? Are you using a similar but different address?
2. Password typos : uppercase and lowercase letters, full-width and half-width characters, extra spaces before and after the password.
3. How you registered : If you registered via Google or similar services, enter through that button.
4. Password Reset : If you can't remember your password, recreate it using the steps in the next chapter.

The third point is easy to overlook. People who registered using buttons like Google's haven't set a password. Therefore, it seems that entering an email address and password will result in an "Incorrect" error (I haven't actually tested this). In this case, please log in using the button corresponding to the method you used to register. If you want to log in with a password as well, there is a way to create a new password from "Forgot Password?" (I haven't actually tested this combination either).

If you make the same mistake multiple times in a row, you may be temporarily unable to try again. I haven't checked the message that appears on the screen at that time. If you make the same mistake repeatedly, please wait a while and then try again calmly.

12. What to do if you forget your password

If you can't remember your password, you can reset it from the "Forgot Password?" link on the login screen. Here's how:

1. On the login screen, click the "Forgot Password?" link.
2. On the "Password Reset" screen, enter your email address twice.
3. Press "Send Reset Email"
4. Enter the 6-digit verification code from the email you received.
5. On the "Set New Password" screen, enter your new password.
6. The process is complete when you see the message "Password has been reset."

Here's an important difference: The reset verification code is only valid for 15 minutes. While the registration code was valid for 24 hours, the reset code is much shorter. Please open and enter the code immediately after receiving the email.

If you enter an email address that is not registered, you will see the message, "This email address is not registered." If you can't remember the email address you used to register, try each address you think you might have used.

The requirements for your new password are the same as when you registered: it must be between 8 and 128 characters long and consist of alphanumeric characters and symbols.

The system is designed so that even those who registered with Google or similar services can log in using their email address and password after resetting their password. However, I haven't actually followed this process to verify it.

13. What to do if you don't receive the verification code email.

If you don't receive the verification code during registration or the password reset code, use the "Didn't receive the email?" instructions on the code entry screen.

1. On the screen where you enter the code, look for "Didn't receive the email?"
2. Press "Resend"
3. "Verification email has been resent" is displayed.
4. Enter the code from the email you received.

If you resend, the code will be sent again using the same mechanism. The number of times you can resend and the required interval between resends are not displayed on the screen, so I cannot explain them in this article.

If you still don't receive the email after resending it, first suspect that you mistyped your email address. The initial registration screen required you to enter your email address twice, and it's possible to make the same typo both times.

Common ways to check if you haven't received an email will be covered in a later chapter.

14. When using two-factor authentication

Membo offers a feature called "two-factor authentication," which requires a 6-digit code in addition to your password when logging in. You enable this yourself through the settings screen.

The access point is under "Security Settings" in "Account Settings" at the bottom of your My Page. On the right side, you'll see a badge indicating whether "Two-Factor Authentication" is enabled or disabled. You cannot access it as a guest, so you need to log in first.

On the settings screen, proceed in the following order:

1. Press "Set up 2FA"
2. On the "Scan QR code with authenticator app" screen, scan the QR code with your authentication app.
3. If the QR code cannot be read, use the "Or enter manually:" field.
4. Enter the 6-digit code displayed in the authentication app into the "Enter authentication code" field.
5. Press "Verify Code"
6. Once you see the message "Two-factor authentication enabled," you're done.

The screen displays the message, "Scan this QR code with an authenticator app like Google Authenticator or Authy." For reference, three apps—Google Authenticator, Microsoft Authenticator, and Authy—are introduced with links to their respective app stores.

The authentication app is a smartphone application that generates a 6-digit code. The code changes every 30 seconds. Official instructions can be found on the next page.

• Get a verification code from Google Authenticator (Google Account Help)
• Authy (Official Website)

For those who have enabled two-factor authentication, the login process is as follows:

1. Enter your email address and password to proceed with login.
2. A "two-factor authentication" screen appears. The instructions say, "Please enter the 6-digit code displayed in your authentication app."
3. Enter the authentication app code and press "Verify".

This screen has a checkbox labeled "Trust this device (valid for 30 days)." Checking this box will allow you to skip two-factor authentication on that device for 30 days. It's safer not to check this box on shared devices. If you enter the wrong code, a message saying "Invalid authentication code" will appear. There's also a cancel option if you want to stop midway.

If you have two-factor authentication enabled, you will be required to enter a code when changing your password, changing your email address, disabling or changing the settings for two-factor authentication, or deleting your account.

If you want to disable two-factor authentication, proceed from "Disable 2FA." A warning message will be displayed stating, "Please manually delete the Membo entry from the authentication app as well," "The authenticator app entry cannot be deleted from the server side," and "If you enable it again, you will need to scan a new QR code." You will need to manually delete the registration from the authentication app.

I confirmed from the screen layout that it can be enabled through security settings. However, this article does not demonstrate the process of actually enabling it and being prompted for it during login.

15. Backup code when the authentication app is unavailable

One concern when using two-factor authentication is what happens if you change or lose your smartphone, rendering the authentication app unusable. A backup code is a solution for this.

The screen displays the following messages: "Use these codes when you can't access your authenticator app. Store them in a safe place." and "Each code can only be used once."

There are two points in particular that we want you to pay attention to.

• The download is only done once : It displays a message saying, "You have already downloaded a backup code. ...If you have lost it, you can generate a new code by disabling and resetting 2FA."
• Each code can only be used once : a code that has been used cannot be used again.

If you cannot use the authentication app, select "Use backup code" on the two-factor authentication screen during login. Then, enter the code you saved.

When you use the last one, a message appears saying, "This is your last backup code. After logging in, you can obtain a new backup code by disabling and then re-enabling two-factor authentication." If you run out of backup codes, it displays, "You have no backup codes left. You can no longer log in using this method. Please contact support."

That's why, when you enable two-factor authentication, it's important to store your backup codes in a safe place right away. If you only store them on your smartphone, you'll lose the codes along with your smartphone if you lose it.

Please check the Membo help page for contact information.

16. Log out and delete your account

Both the logout and account deletion options can be found in the "Account Settings" menu on your My Page.

To log out, press "Logout," answer the confirmation "Are you sure you want to logout?", and "Logged out successfully" will be displayed, returning you to the authentication screen. If you are using a shared terminal, please complete the logout process. After logging out, a guest mode button will also appear on the authentication screen, allowing you to return to view-only mode.

I couldn't find a dedicated "Return to Guest" button. The process involves logging out and then selecting "Guest" on the authentication screen.

To delete your account, go to "Delete Account" at the bottom of the menu. The process involves two steps.

1. You can write any comments you like (up to 5,000 characters) on the "Account Deletion" screen.
2. On the "Final Confirmation of Account Deletion" screen, you will be asked, "Are you sure you want to delete your account? This action cannot be undone. All your data will be deleted."

Once completed, you will see a message saying, "Your account has been deleted. Thank you for using our service." Please proceed carefully, as this process cannot be undone. If you have two-factor authentication enabled, you will be prompted to enter your authentication code first.

I haven't checked whether it's possible to register again with the same email address after canceling your membership.

The handling of personal information is described in Membo 's Privacy Policy and Terms of Service .

17. Common verification methods (not those provided by the app)

From here on, the instructions are not specific to Membo , but rather general methods for verifying online logins. These methods aren't unique to Membo , so please read them as "potential verification methods."

• If you don't receive emails : Check your spam folder. Also, check your email settings to see if the emails have been filtered.
• If the page doesn't progress : Reload the page. Try opening it in a different browser.
• If your connection is unstable : Try switching between Wi-Fi and your mobile data connection.
• If the input is incorrect : Make sure the password is visible and check for typos. When copying text saved in a memo, check that there are no leading or trailing spaces.

These are not procedures that are guaranteed to work. They are simply options to try in order to narrow down the cause one by one.

If the problem persists after trying the suggested solutions, please note down the exact wording displayed on the screen and refer to the latest instructions on the Membo help page or the news page . Providing the exact wording will help us pinpoint the cause of the problem.

18. Things not confirmed in this article

Let me be honest. The following points have not been verified, so they are not stated as fact in this article.

• I demonstrated the entire process of logging into Google and Facebook : from the presence of the buttons to understanding how it works.
• Trying two methods in succession and having the accounts merge : This is how I understand the system to be designed.
• Apple's behavior when selecting "Private Email" : Not verified.
• The message displayed on the screen when logging in incorrectly multiple times : Not verified.
• Result of password reset attempts by users who registered with Google, etc .: Not verified.
• Password server-side conditions, number of retries and intervals : Not verified.
• Re-registration with the same email address after deleting your account : Not verified.
• Google, Facebook, and Apple login on the smartphone app version : Not verified.
• The validity period of the authentication code (24 hours after registration, 15 minutes for resetting) and the mechanism for grouping them under the same email address : This information was verified by reading the program code, not by testing on a production server.

The information written here may change with app updates. For the latest information, please check the Membo news page , help page , and push notification usage page .

19. Frequently Asked Questions

Q. Are registration and login the same button?

This is different for email addresses. When registering for the first time, use "Sign up with Email," and if you are already registered, use "Already registered? Login." The Google, Facebook, and Apple buttons also function as "Register/Login."

Q. If I register with my email address and then log in with Google, will it become a different account?

If you use the same email address, it will be consolidated into one account. However, I haven't verified this by continuously testing it on an actual device.

Q. What is the minimum number of characters for a password?

For registration, your password must be between 8 and 128 characters long and consist of alphanumeric characters and symbols. The login screen requires a minimum of 6 characters, but registered users already have a minimum of 8 characters, so you don't need to worry about that.

Q. How long is the verification code valid?

The registration code is valid for 24 hours, and the password reset code is valid for 15 minutes. Since the reset code is short, please enter it immediately after receiving the email.

Q. Is there a checkbox for "Keep me logged in"?

It's not on the screen.

Q. When I pressed the Google button in LINE, a warning appeared.

The in-app browser is not designed to support Google and Facebook logins. As warned, please reopen the app in Safari or Chrome. Apple and email addresses are not included in this warning.

Q. I get the message "Invalid email or password." Which one is wrong?

This wording is designed not to distinguish between the two. Please check your email address, password, and registration method in that order.

Q. I've lost my backup code.

The download is designed for one-time use only. If you lose it, a message will appear on the screen instructing you to temporarily disable two-factor authentication and then re-enable it to generate a new code. You must be logged in to disable it. If you cannot log in, please check the help page.

Q. Can I continue using it without registering?

You can use guest mode to simply view content. To send messages or make posts, registration and login are required. For more details, please see the guest article .

20. Summary: If in doubt, use the email address you always use.

This article explains how to register and log in to Membo , following the order of the screen names.

1. There are four entry points : email address, Google, Facebook, and Apple. Guest mode can also be selected from the same screen.
2. Registering your email address involves three steps : enter your email address twice, enter a 6-digit code, and choose a password.
3. Passwords must be at least 8 characters long and consist of alphanumeric characters and symbols (full-width characters are not allowed).
4. If the email address is the same, it should be consolidated into one account : that's how it appears to work (I haven't tried both methods consecutively).
5. Google and Facebook cannot be used within LINE or Instagram : Reopen them in Safari or Chrome.
6. The "Incorrect" message is designed so that it's unclear which part is wrong : it checks the email address, password, and registration method in that order.
7. The password reset code will be issued within 15 minutes , not the 24 hours given during registration.
8. If you use two-factor authentication, save your backup codes : you only need to download them once.

Logging in is something that requires a little care each time. Remembering how you registered will greatly reduce confusion. The "How to Use" series has so far covered: 1. How to find postings, 2. Favorites, 3. Profile, 4. Guest scope, 5. Map, 6. Messages, and 7. Notifications. In this 8th installment, we have organized the registration and login process, which is the entry point. For information about writers, please see the writer introduction page.