https://www.binance.com/en/land/japan-may-notice-en

Information for Japan Resident Customers of Binance.com About Transition to the New Local Platform
We are pleased to announce that we have created a new platform for residents in Japan in order to fully comply with local regulations. The new platform will be available this summer. We will inform the launch date and provide further details in the coming months.
With regard to the global platform you are currently using, please note the current services will be discontinued for Japan residents on November 30, 2023.
Users of the global platform will be able to migrate to the new local platform through a new identity verification process (KYC), which will be available after August 1, 2023.
If you have any questions, please reach out to customer service via CS chat.