General · EdgepediaOctober 3, 20265 min read

A Letter to Momo (ももへの手紙)

A Letter to Momo (ももへの手紙, Momo e no Tegami) is a 2012 Japanese animated fantasy drama film about an 11-year-old girl who moves to an island in the Seto Inland Sea after her father's death and encounters three yokai, goblins from Japanese folklore, invisible to everyone but her. It was written, storyboarded, and directed by Hiroyuki Okiura, produced by Production I.G, and released in Japan on April 21, 2012, with a running time of 120 minutes.¹^•²

Key fact	Detail
Release	April 21, 2012 (Japan), distributed by Kadokawa Pictures; 120 minutes, rated G¹
Director	Hiroyuki Okiura, his second feature after Jin-Roh: The Wolf Brigade (1999), about 13 years later²
Production	Production I.G; total production period of seven years³
Main cast	Karen Miyama as Momo, Yuka as her mother Ikuko, Toshiyuki Nishida as Iwa, Koichi Yamadera as Kawa, Cho as Mame¹
Technique	Traditional hand-drawn 2D animation⁴
Awards	Excellence Prize at the 15th Japan Media Arts Festival; Grand Prize at the 16th New York International Children's Film Festival; Platinum Grand Prize at the 14th Future Film Festival¹
World premiere	36th Toronto International Film Festival (2011)¹

Spoilers

Story

Momo Miyaura quarreled with her father and never made up; he died in an accident, leaving behind an unfinished letter with only the words "To Momo" (ももへ) written on it. She and her mother Ikuko move from Tokyo to Shiojima, a small island in the Seto Inland Sea where relatives live. Unable to settle into her new life and preoccupied with what her father had wanted to write, Momo one day finds an old book in the attic, and strange things begin to happen around her.²^•³

She meets a trio of yokai who call themselves the "Watchers" (見守り組): Iwa, Kawa, and Mame. Invisible to ordinary people, the gluttonous but endearing three gradually open Momo's heart. As her mother, cheerfully busy with work, and Momo drift apart and the tension erupts into a family quarrel, Ikuko, who had been straining herself for her daughter's sake, falls ill, and the story moves toward Momo's reconciliation with her father's memory.⁵^•⁶

The Japan Times reviewer Mark Schilling, a film critic for that newspaper, noted that Okiura presents Momo as an average girl rather than a tragic victim or the usual spunky anime heroine; in one scene she reluctantly joins local children for a swim, watches them leap off a high bridge into the harbor, and heads home alone.⁷

Production

Okiura, an animator and character designer with a three-decade career, spent seven years developing the film after the 1999 release of his first feature, Jin-Roh: The Wolf Brigade.⁷ Production I.G president Mitsuhisa Ishikawa said the film took seven years to make and that the production faced difficult situations along the way.⁸ In an interview, Okiura described a schedule in which animators had to be booked years in advance, waiting for one animator's current work to finish a year before he could join.⁵

Setting and staff. Okiura traced his family roots to Tomonoura in Hiroshima, touring islands of the Seto Inland Sea after finishing Jin-Roh, and drew on that background for the island setting.⁵ The animation supervisor was Masashi Ando, known for Spirited Away, with Hiroshi Ohno as art director and Mina Kubota composing the music.¹ The key animators included Toshiyuki Inoue (AKIRA), Eiji Inoue (The Cat Returns), Takeshi Honda (Evangelion: 2.0), Tetsuya Nishio (Innocence), and Hiroyuki Aoyama (Summer Wars).⁹ The theme song, "Uruwashi Mahoroba ~Utsukushiki Basho~", was performed by Yuriko Hara of Southern All Stars.³

Casting. Karen Miyama voiced Momo and the television actress Yuka voiced Ikuko; Okiura said he chose Miyama for her natural acting and Yuka for a voice that was bright yet refined.¹⁰ The veteran actor Toshiyuki Nishida voiced Iwa, the leader of the three yokai; Okiura wrote that the role needed a hot-blooded middle-aged character with charm, and that only Nishida could combine realistic acting with comedy.¹⁰

Release and reception

The film premiered worldwide at the 36th Toronto International Film Festival in 2011 and opened in Japan on April 21, 2012 on 300 screens.¹^•¹¹ In South Korea it opened on July 5, 2012 on 253 screens and sold 315,180 admissions for a gross of $1,545,772.¹² Blu-ray and DVD editions were released in Japan on October 26, 2012.¹³

Critical response was generally favorable. On Rotten Tomatoes the film holds an 80% Tomatometer from 30 reviews and a 75% audience score from over 1,000 ratings, with the site's critics consensus calling it "sweet, sad, and visually striking".¹⁴ The New York International Children's Film Festival praised the "painstakingly rendered" island scenery and called the finale the best flight of supernatural fancy since Spirited Away.¹¹ Roger Ebert's website noted that the two-hour length is felt in an over-long first act, taking almost half an hour for Momo to meet the imps who become the backbone of the story.¹⁵

Awards

The film received the Excellence Prize in the animation division of the 15th Japan Media Arts Festival, the Grand Prize for feature film at the 16th New York International Children's Film Festival, the Platinum Grand Prize at the 14th Future Film Festival, the best feature award in the feature category at the 11th Anifest international animation festival, and the audience award at the 16th Fantasia International Film Festival.¹ The Future Film Festival jury described it as a coming-of-age story dealing with loss and guilt, elaborated through humor-filled and heart-moving narrative paths with meticulous animation.¹¹

References

Initially written Oct 3, 2026 · Reviewed: Oct 25, 2026 · Edited: Oct 15, 2026; Oct 25, 2026; Nov 1, 2026