Last name Junsaku (Junsaku ) , all over the world, is an extremely rare cognomen. Much more frequently, Junsaku is the forename as well as the last name.
ジュンサク
Ito, Yokotani, Yamamoto, Watanuki, Watanabe, Fujimoto, Hasegawa, Nakamura, Shimizu, Yamada, Kobayashi, Fujita, Hirano, Harada, Takita, Tanabe, Kimura, Suzuki, Ueda, Hori, Kato, Hirata, and Yoshihara
) , all over the world, is an extremely rare cognomen. Much more frequently, Junsaku is the forename as well as the last name.