Regaining visitation rights in Japan can be a difficult and complicated process, especially for non-Japanese parents who may face cultural and legal barriers. Here are some general steps that can be taken to try to regain visitation rights in Japan:

1. Seek legal advice: It is important to consult with an experienced family law attorney in Japan who can advise you on your legal options and rights under Japanese law.
2. Negotiate with the other parent: Attempt to communicate with the other parent and try to reach a mutually agreeable solution for visitation rights. If necessary, consider using a mediator or arbitrator to facilitate discussions and negotiations.
3. File a petition with the court: If negotiations fail, file a petition with the family court in Japan requesting visitation rights. It is important to provide evidence that shows your relationship with your child and your ability to care for them.
4. Attend court hearings: Attend all scheduled court hearings and present your case to the judge. Be prepared to provide evidence, such as documents, witness statements, and photos, that support your case for visitation rights.
5. Follow court orders: If the court grants you visitation rights, it is important to follow all court orders and requirements. This includes showing up for visitation at the designated times and locations, and not violating any court-imposed restrictions.
6. Seek assistance from your embassy: If you are a non-Japanese parent, consider seeking assistance from your embassy or consulate in Japan. They may be able to provide resources and support for navigating the legal system in Japan.

Regaining visitation rights in Japan can be a challenging and lengthy process. It is important to seek legal advice and support, maintain a positive relationship with the other parent, and comply with all court orders and requirements.