Tokyo is the Capital of Japan.

东京是日本的首都。

youdao

Kyoto used to be the capital of Japan.

京都曾是日本的首都。

《新英汉大辞典》

Do you know which city is the capital of Japan?

你知道哪个城市是日本的首都吗？

youdao

As the cultural capital of Japan, traditional arts are actively cultivated in the city.

BBC: Kaiseki-ryori: Japanese haute cuisine

Again, I expect the flow of capital out of Japan to continue, and I remain very bullish about non-Japanese stocks.

FORBES: Put Some Money in Japan

Last month, facing sharp drops in their stock prices, Morgan Stanley and Goldman Sachs sought the safety of bank holding company status, and got injections of capital from Japan's Mitsubishi UFJ and Warren Buffett, respectively.

FORBES