First mainstream film directed by Genji Nakamura, based on Yasutaka Tsutsui's 1974 short story of the same title.

Two poor, married farmers have recently lost their only child; after a freak visitation, they pry open an alien cocoon to greet their new daughter.

Momotaro carries this sword into battle against injustice in shogunate Japan. Aided by ninja he must now wage a furious battle against the terrible...