Cognomen Senkichi (Senkichi 
) , throughout the world, is a very rare surname. The surname Senkichi is habitual in Japan, where it is a very rare surname, and Spain. Much more prevalently, Senkichi is the forename as well as the last name.
Abe, Tanaka, Tamura, Shibata, Kikuchi, Hayashi, Maruyama, Miyamoto, Miyazaki, Sakamoto, Kanazawa, Takeuchi, Nakamura, Nakajima, Watanabe, Yamamoto, Yamazaki, Yoshizawa, Matsumoto, Kobayashi, Takahashi, Hashimoto, Kimura, Kojima, Kaneko, Suzuki, Ito, Ono, Mori, Sato, Aoki, Kudo, Gomi, Goto, Endo, Hara, Ishibashi, Hino, Ueda, Maeda, Miura, Saito, Fujii, Inoue, Okubo, Ogawa, Murata, Sasaki, Ueno, and Yamaguchi