is a 1981 Japanese animated science fiction comedy-drama short film.ドラえもん ぼく桃太郎のなんなのさ：作品情報・キャスト・あらすじ (in Japanese). Eiga.com.

It premiered in Japan on August 1, 1981In the Osaka area, it released two weeks earlier on July 18, 1981. on a double feature with 21 Emon: Welcome to Space!.“Doraemon the Movie Festival” to Be Held - All 35 Movies to Be Screened in 35 Days in Jinbocho. Otakumode.com. December 21, 2014. Retrieved August 31, 2026.

It is largely an expanded and modified version of the 1975 Doraemon, Bakeru-kun, and Another Story chapter "What Am I for Momotaro?", albeit removing all Bakeru-kun elements and characters.

Synopsis For his school's summer vacation homework assignment, Nobita decides to research his town's history. He uses Doraemon's secret gadget, the "Time Camera", to photograph the past, but to his surprise, it captures the image of Momotarō and his companions hauling a cart full of treasure.

Meanwhile, a small picture held by a man named Dutch, a foreigner who Nobita's mother Tamako had just met, happens to depict a samurai dressed just like Momotarō, with the photograph-like picture having been passed down through Dutch's family for generations.

Thinking Momotarō might have been a real person, Nobita and Doraemon both go back in time to past Japan alongside Shizuka, Suneo, and Gian.

Cast

An unofficial English version, produced and released exclusively in Malaysia by Speedy Video, features an unknown voice cast.Malaysian English Dub Doraemon - The Lost Media Wiki CharacterJapanese voice actor Doraemon Nobuyo Ōyama Nobita Nobi Noriko Ohara Shizuka Minamoto Michiko Nomura Suneo Honekawa Kaneta Kimotsuki Takeshi "Gian" Gōda Kazuya Tatekabe Tamako Nobi Sachiko Chijimatsu Nobisuke Nobi Masayuki Katō Dutch Grandma Sachiko Chijimatsu Grandpa Masayuki Katō Oni Teiji Ōmiya Village Chief Mahito Tsujimura Villagers Reizō NomotoToku NishioKazuhiko Inoue 21 Emon Kazuhiko Inoue

Production The first Doraemon feature film, Doraemon: Nobita's Dinosaur released in March 1980, followed by Doraemon: The Records of Nobita, Spaceblazer in March 1981. Five months after Spaceblazer however, Doraemon: What Am I for Momotarō? released as a summer holiday film (making 1981 a year with two Doraemon films), but because it was the sole exception to the tradition of March releases for Doraemon feature films until 2020's Doraemon: Nobita's New Dinosaur, it is often distinguished as a short film.

The title is a play on the catchphrase "What are you to her?" (あんた、あの娘のなんなのさ?) from the hit 1975 Japanese rock song "Port of Yoko, Yokohama, Yokosuka" (港のヨーコ ヨコハマ ヨコスカ).

Soundtrack Theme songs "I'm Doraemon" (ぼくドラえもん) Lyrics: Fujiko Fujio / Composition and Arrangement: Shunsuke Kikuchi / Vocals: Nobuyo Ōyama, Koorogi '73 "Blue Sky in the Pocket" (青い空はポケットさ) Lyrics: Hiroo Takada / Composition and Arrangement: Shunsuke Kikuchi / Vocals: Kumiko Ōsugi Insert song "Doraemon's Song" (ドラえもんのうた) Lyrics: Takumi Kusube / Composition and Arrangement: Shunsuke Kikuchi / Vocals: Kumiko Ōsugi

Release The short film was released in Japan on August 1, 1981.

It screened theatrically in a double feature with the 21 Emon film 21 Emon: Welcome to Space!.

In 2015, to celebrate the 35th anniversary of the Doraemon movie series and in commemoration of the theatrical release of Doraemon: Nobita's Space Heroes, What Am I for Momotarō? was screened with Doraemon feature films from Doraemon: Nobita's Dinosaur to Doraemon: Nobita in the New Haunts of Evil ~Peko and the Five Explorers~ and other theatrical Doraemon short films at the "Doraemon the Movie Festival", held at the Jinbōchō Theater from January 31 to March 6.

Streaming In 2024, for the occasion of the 90th anniversary of Fujiko F. Fujio, Doraemon: What Am I for Momotarō? alongside numerous animated short films of Doraemon, Perman, Esper Mami, and Chimpui were made available to stream on Prime Video in Japan as the "Fujiko F. Fujio's 90th Anniversary Film Masterpiece Selection".プライムビデオで、『藤子・F・不二雄生誕90周年記念 映画併映作傑作選』『テレビシリーズ傑作選』が配信中。「2112年 ドラえもん誕生」など併映作や、『パーマン』『21エモン』『エスパー魔美』『キテレツ大百科』などから20エピソードが視聴可能に (in Japanese). Denfaminicogamer. March 7, 2024. Retrieved August 30, 2026.『映画ドラえもん』シリー ズ &なつかしのFキャラクター作品に加え Amazonプライムビデオに 「ドラえもん誕生日スペシャル」 エピソードが13本追加! (in Japanese). Dora-world.com. September 6, 2024. Retrieved August 30, 2026.『藤子・F・不二雄 生誕90周年記念 映画併映作傑作選』 ✧₊ 見 放 題 独 占 配 信 中　₊✧ (in Japanese). Twitter. March 6, 2024. Retrieved August 30, 2026.

Reception Box office reception Because the short film was screened as a double feature with 21 Emon: Welcome to Space!, it grossed ¥500 million yen ($3 million) at the Japan box office.

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