Kenkichi (written: 健吉, 謙吉 or 鎌吉) is a masculine Japanese given name. Notable people with the name include:
- Kenkichi Ando (安藤 謙吉?) (born 1950), Japanese weightlifter
- Kenkichi Iwasawa (岩澤 健吉?) (1917–1998), Japanese mathematician
- Katakura Kenkichi (片倉 健吉?), Japanese nobelman
- Kenkichi Oshima (大島 鎌吉?) (1908–1985), Japanese triple jumper
- Kenkichi Sonogashira (薗頭 健吉?) (born 1931), Japanese chemist
- Kenkichi Ueda (植田 謙吉?) (1875–1962), Japanese general
- Kenkichi Yoshizawa (芳沢 謙吉?) (1874–1965), Japanese diplomat
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