Shokichi Natsui (?? ??, Natsui Shokichi, 10 October 1925 – 13 September 2006) was a Japanese judoka from the Akita Prefecture.
He became the first world champion in judo, winning the title at the 1956 World Judo Championships in Tokyo, by beating Yoshihiko Yoshimatsu in the final.
As there were no weight classes in the world championships until 1965, Natsui was the only champion in 1956.