Please try the following:

If you cannot log in with your ID and password, one of the following may be the cause:

・Your login ID (email address) may have been entered using full-width characters.
→ Please enter it correctly, or try copying and pasting it.

・There may be spaces before, after, or within your ID or password.
→ These spaces may not be visible, so please place the cursor in each field and check carefully.

・Your ID or password may be incorrect.
→ Please use the ID/Password Reminder page below to check your login details.
■ ID/Password Reminder
https://www.kosokubus.com/_en/?page=reminder

・Your browser cache may be preventing you from logging in.
→ Clear your browser cache and try again, or try using a different browser.

・You may have made your reservation as a guest.
→ Please log in to the Guest My Page using your reservation number and phone number.

If you do not know your ID or password:
Please use the ID/Password Reminder.

[If you do not know the answer to your security question]
Please contact us by emails: info-inbound@kosokubus.com