Yoichi Hatta (八田 與一, Hatta Yoichi, February 21, 1886 – May 8, 1942) was a Japanese engineer, known for his contributions in hydraulic engineering in the Japanese-ruled Taiwan.

After graduating from Tokyo Imperial University in 1910, he joined the Seat of Governor-General of Taiwan and served as a technician of the government.

[1] He was killed on board the transport ship Taiyō Maru, when it was torpedoed and sunk on May 8, 1942 by US submarine Grenadier.

[2] In contemporary Taiwan, he is honored as a deity for his contributions to irrigation.

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