National Okinawa Youth Friendship Center is a national educational facility for young people located in Tokashiki Island in the southernmost part of Japan, 32 kilometers west of Naha City. It is surrounded by the Kerama sea, which is among the most transparent sea in the world. The free marine training program takes advantage of its excellent marine environment and is very popular among users of the Center. For the accommodation for young visitors, this facility only charges ¥200 for a sheet for their stay.