Hatsuko Morioka (?? ??, Morioka Hatsuko, born June 22, 1915) is a Japanese freestyle swimmer.
She participated in two Olympic Games with Hideko Maehata, both of whom were from the same area, and Moriaka competed the individual 400 m and 4 × 100 m relay events at the 1932 and 1936 Summer Olympics with the best result of fifth place in the relay in 1932.