Updated: Jan. 21, 2019
Casio has a telephone hotline in Japan for questions (in Japanese only) about camera repair:
0570-004161 (Alternate number: 042-560-4161)
Operators are on duty Mon. to Sat. from 9 am to 6:30 pm. Closed on Sun. and national holidays.
Direct phone numbers to their service stations are listed below. The hours are usually from 9 am to 5:30 pm. Closed on Sat., Sun., and national holidays. Click on the links for the respective map and address in Japanese. The Akihabara, Osaka, and Fukuoka Service Stations offer a quick repair service for minor camera repairs completed within an hour.
Casio Service Stations in Japan listed in Japanese here: