Hashira no kai and Eizo-Soko member require separate account linking.
Ensure both are linked to your AKB48 Group ID to apply for their respective exclusive tickets.
Please check the following:
Membership Status
Ensure you are registered as a Hashira no kai subscriber or Eizo-Soko member.
(Check your subscription status on the Hashira no kai or Eizo-Soko member website.)
Account Linking
After subscribing, did you link your AKB48 Group ID on the Hashira no kai or Eizo-Soko member site?
⇒ If not, please complete the linking process on the respective website.
Matching Login ID
Verify that the ID you are using to log in to ZAIKO matches the AKB48 Group ID linked to your Hashira no kai or Eizo-Soko member account.
If not, log in to ZAIKO with the correct ID.
Application History
If you have already applied, you cannot apply again. Check your application history on ZAIKO.