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In all the world, Kazuya (Kazuya , カズヤ , Казуя , along with others...) is quite a rare boy's given name. The given name Kazuya is characteristic of Japan, where it is quite a rare male name, Indonesia, where it is a rare largely boy's, but uncommonly female name, and Belgium, where it is a very rare boy's name. In absolute terms, the name is most common in Japan, Indonesia, and China. Predominantly, Kazuya is the last name as well as the forename.
Kazuya is also a name for the fictitious and mythical characters: Kazuya Mishima , the fictional character from Tekken, Tekken 7; Kazuya Oki , the Fictional character of Kamen Rider Super-1; Kazuya Hiramaru , character in Bakuman; Kazuya Uesugi , character in Touch and Kazuya Hara , the character from Kuroko's Basketball.