Tokyo, Japan’s busy capital, mixes the ultramodern and the traditional, from neon-lit skyscrapers to historic temples. The current capital of Japan is Tokyo. A prefectural capital is a city where a prefectural government and assembly is located. Tokyo Capital of Japan 2019 Tokyo, Japan's busy capital, mixes the ultramodern and the. Tokyo, city and capital of Tokyo to (metropolis) and of Japan. Originally known as Heian-Kyo, Kyoto was Japan's capital city for more than a millennium.