Procedures for renewal or extension of duration for passports may be done in Japan at an embassy or consulate of your home country. Check with an embassy or consulate of your home country for details.
Furthermore, in Akita and Iwate Prefectures, as well as other places, there exist "one-day consular service events" for China and the Philippines. At these events, you can renew your passport, consult with the consulate, and receive other services in Akita and Iwate Prefectures, and other places. Ask a consulate about when and where one day consular service events are taking place.
