Hifumi Katō (加藤 一二三, Katō Hifumi, born January 1, 1940) is a retired Japanese professional shogi player who achieved the rank of 9-dan. He is a former Meijin, Tenth Dan, Ōi, Kiō and Ōshō major title holder. He has the nicknames 123 and ひふみん Hifumin given by his fans. Katō had the record for the youngest professional player who went pro at 14 years and 7 months old until Sōta Fujii became professional in 2016 at age 14 years and 2 months.