Family name Junsuke (Junsuke 
) , all over the world, is an extremely rare last name. Much more frequently, Junsuke is the forename as well as the last name.
Eto, Inoue, Okada, Umino, Matsuo, Suzuki, Tanaka, Tamura, Hirose, Fukuma, Fukuda, Yamada, Uchida, Kumagai, Hayashi, Yoshida, Miyauchi, Murakami, Takasaki, Nakamura, Watanabe, Yamamoto, Inaba, Fujii, Hirai, Honda, Ito, Ota, Maki, Mori, Sato, Ando, Arai, Asai, Aoki, Kato, Kobayashi, Kida, Naga, Noda, Yano, Ueno, Ueda, Maeda, Motai, Koike, Nagai, Naito, Goto, and Takahashi