FAQ
Recent FAQ
【For users who already have a Bitfan ID (free account)】 How to join










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【For users without a Bitfan ID】How to join









How to change your membership plan
If you would like to change your membership plan (Monthly / Annual / Annual + Merch), you will need to cancel your current membership first.
After canceling or once your membership expires, you can switch plans by rejoining your desired plan by the end of the following month.
If you are currently on a Monthly plan
After logging in to the site, please go to My Page and use the “Cancel" button.
After canceling, if you rejoin your desired plan within one month with the same Bitfan ID, all your membership information—including your original join date—will be carried over.
Example:
If you cancel in March (membership ends at the end of March)
→ Please rejoin your desired plan in April with the same Bitfan ID.
If you are currently on an Annual / Annual Plan with Exclusive Merchandise
You cannot cancel during the active membership period. You can change your plan after your membership expires.
If auto-renewal is enabled, please make sure to turn it off by the day before your next billing date.
After your membership expires, if you rejoin your desired plan within one month with the same Bitfan ID, all your membership information—including your original join date—will be carried over.
Example:
If your Annual plan is valid until February 28, 2027, and you want to switch to Annual + Merch
→ Please rejoin the new plan between March 1 and March 31, 2027, with the same Bitfan ID.
Notes:
If you rejoin within the same month after canceling a Monthly plan, you will be charged for both the canceled plan and the new plan.
To avoid duplicate charges, please rejoin in the following month.
Annual and Annual + Merch plans cannot be canceled during the active period.
Due to the nature of digital content, cancellations and refunds are not available after purchase.
I’m not receiving the email newsletter
Please check the following possible reasons.
■ The email was automatically sorted into spam or blocked
If you are using a computer email address:
Depending on your email service, email software, or antivirus software settings, emails from this site may be identified as spam and may not be delivered. Please check all inboxes, including your spam folder, and review the settings of the service or software you are using.
If you are using a mobile carrier email address:
The email may not have been delivered due to your mobile carrier’s spam filter or domain settings.
Please make sure you can receive emails from nagaseren-official.com.
*Please note that even if you do not remember changing your email settings, some mobile carriers may have stricter security settings enabled by default. Please make sure to check all settings before contacting us.
■ An incorrect email address is registered
Please check your registered email address on My Page.
I forgot my password.
Reset your password Reset your password here.
I didn’t receive the verification email
■ Resend the verification email
After checking your spam filter settings below, please try resending the verification email from [the “Resend verification email” page.]
■ Check your spam filter settings
Emails are sent from the domain @bitfan.id.
Please check your spam filter and auto-sorting settings, and make sure you can receive emails from this domain.
For spam filter settings on mobile carrier email addresses, please refer to the following:
docomo / au / SoftBank
Please note:
If you are using a carrier email address, you may not receive emails even after updating your settings.
If this happens, we recommend using a webmail service such as Gmail or Yahoo Mail instead.
■ Incorrect email address entered
Please check your email address and try signing up again.