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Family name Kotsu (Kotsu
) , around the world, is quite a rare cognomen. The last name Kotsu is characteristic of Japan, where it is quite a rare surname, Nigeria, where it is a very rare surname, and Australia. Not in comparison with a country's population, it is commonest in Japan, Nigeria, and India. More prevalently, Kotsu is the forename as well as the last name.
Ito, Tanaka, Nagano, San-Rin, Egashira, Hayashi, Mohammed, Muhammad, Sakamoto, Kurihara, Takayama, Nakajima, Hasegawa, Watanabe, Yamamoto, Sakaguchi, Kobayashi, Kinoshita, Takahashi, Tsukamoto, Koyama, Hashimoto, Suzuki, Mamman, Ono, Mori, Sato, Aoki, Baba, Kato, Kono, Gana, Liam, Hara, Isah, Simon, Ayame, Kondo, Toida, Nanba, Nakai, Ishii, Ikeda, Sasaki, and Yamashita