OKINAWAN, CENTRAL (OKINAWAN, LUCHU) [RYU] 900,000 in all countries all Ryukyuan languages. Central Okinawa; southern Okinawa Island, Kerama Islands, Kume-jima, Tonaki, Aguna islands, and islands east of Okinawa Island. Japanese, Ryukyuan, Amami-Okinawan, Southern Amami-Okinawan. Dialects: SHURI, NAHA, TORISHIMA, KUDAKA. Inherent intelligibility is generally impossible or very difficult with other Ryukyuan languages and Japanese. Ryukyu languages are 62% to 70% cognate with Tokyo dialect of Japanese. The younger the generation, the more fluently they speak Japanese (1981 Hattori in Wurm and Hattori). Those over 50 use the vernacular at home among themselves but can understand and use Standard Japanese. Those 20-50 can understand the vernacular but use Japanese at home and work. Those under 20 are mainly monolingual in Japanese (T. Fukuda SIL 1989). Bible portions 1855-1858.