Japan seized Ryukyu in 1879 and changed its name to Okinawa Prefecture.

1879年，日本吞并琉球并改称冲绳县。

youdao

Japanese defence officials reported seeing six warships sailing in international waters near the country's southern Okinawa prefecture.

日本防卫省说发现六艘中国海据军舰顺利通过了靠近冲绳南部的公海海域。

youdao

The plan did not specify the location but Japanese media have said 100 ground troops will be sent to Yonaguni, in Okinawa prefecture, where Japan currently has no troops.

该项计划没有提及具体的地点，但是日本媒体已经报道说有100名陆军士兵将被派往冲绳地区的与那国岛，在那里目前尚无驻军。

youdao

Okinawa is Japan's smallest prefecture in terms of land, but it is home to about half the approximately 47,000 U.S.military personnel on bases and ships in the country.

VOA: standard.2009.11.11

The second incident took place in 2004 when a Chinese nuclear-powered submarine entered Japanese territorial waters near Okinawa prefecture's Ishigaki Island.

WSJ: Japan on Alert Over Submarines Near Its Territorial Waters

Japan's Defense Ministry said a submarine was spotted by a P-3C Maritime Self Defense Force patrol aircraft Sunday nightpassing near Kume Island in Japan's Okinawa prefecture in the East China Sea.

WSJ: Japan on Alert Over Submarines Near Its Territorial Waters

Japan's defense ministry said a submarine was spotted by a P-3C Maritime Self-Defense Force patrol aircraft Sunday night passing near Kume Island in Japan's Okinawa Prefecture in the East China Sea.

WSJ: Japan on Alert Over Submarines Near Its Territorial Waters