とー【唐】 : too | define meaning

Derived from the name of the Tang Dynasty, which ruled a great portion of what is now Eastern and Northwestern China from the early 7th to 10th centuries CE. The name was borrowed into early Japanese as たん【唐】 tan and was later vocalized into たう tau. Its pronunciation changed to too some time during Middle Japanese, and its spelling was officially changed to とう tou following the 1946 Japanese spelling reform. Semantically, the term fell out of use in mainland Japan all except in a few compound words, being preferentially replaced by the Chinese endonym 【中国】 zhōngguó, adapted into Japanese as ちゅうごく chuugoku "China". The name とー too (occasionally written とう tou to match Japanese spelling), however, continues to remain in active use throughout the Ryukyu Islands.