Yasui (written: 安井 or 保井) is a Japanese surname. Notable people with the surname include:
- Hisaharu Yasui (安井 久治, 1951–2015), Japanese judge
- Hisato Yasui (安井 久登, born 1976), Japanese swimmer
- Junichiro Yasui (安井 潤一郎, born 1950), Japanese politician
- Kizo Yasui (安居 喜造, 1899–1983), Japanese businessman
- Kono Yasui (保井 コノ, 1880–1971), Japanese biologist
- Kunihiko Yasui (安井 邦彦, born 1960), Japanese voice actor
- Minoru Yasui (安井 稔, 1916–1986), American lawyer
- Misako Yasui (安井 美沙子, born 1965), Japanese politician
- Nakaji Yasui (安井 仲治, 1903–1942), Japanese photographer
- Yasui Sanchi (安井 算知, 1617–1703), Japanese Go player
- Sentetsu Yasui (安井 仙哲, 1734–1780), Japanese Go player
- Shōji Yasui (安井 昌二, 1928–2014), Japanese actor
- Yasui Sokken (安井 息軒, 1799–1876), Japanese Confucian scholar
- Sōtarō Yasui (安井 曾太郎, 1888–1955), Japanese painter
- Takuma Yasui (安井 琢磨, 1909–1995), Japanese economist
- Takuya Yasui (安井 拓也, born 1998), Japanese footballer
- Tamiko Yasui (保井 多美子, born 1942), Japanese fencer
- Seiichirō Yasui (安井 誠一郎, 1891–1962), Japanese politician
See also
edit- Yasui house, one of the four Schools of Go during the Edo period
- Yasui procedure, a pediatric heart operation
- Yasui v. United States (1943), a decision by the Supreme Court of the United States