Family name Santoku (Santoku 
) , in the world, is quite a rare last name. The family name Santoku is habitual in Japan, where it is quite a rare surname, and India, where it is an extremely rare surname. More frequently, Santoku is the forename as well as the last name.
Ei, Okabe, Ozaki, Matsuo, Sakata, Sasaki, Suzuki, Kagawa, Hamada, Fukuda, Fujita, Matsuda, Shimizu, Nishida, Yoshida, Matsuoka, Nakamura, Nakajima, Fujimoto, Watanabe, Matsumoto, Kobayashi, Ishii, Inaba, Tsuji, Kondo, Oi, Ram, Ino, Ito, Ono, Ota, Mori, Sato, Seki, Ando, Takahashi, Kato, Koga, Kojo, Kubo, Goda, Goto, Nose, Hino, Maeda, Saito, Senda, Kaji, and Hashimoto