{"rewrite":{"id":"r_22f8bed2f70091604df43a48","clusterId":"c_eca026c1f175436b27637e21","slug":"taisuke-niihara-joins-live-action-my-sister-s-boyfriend-film-as-assistant-producer","model":"deepseek-v4-1-flash","headline":"Taisuke Niihara Joins Live-Action My Sister's Boyfriend Film as Assistant Producer","summary":"The live-action film of Amu Meguro's manga My Sister's Boyfriend has added Taisuke Niihara to its cast. He plays Amamiya, a new assistant producer at the TV station where Sui's older sister Momo works. Masaki Hashimoto plays Midori Yukishiro and Runa Nakajima plays Sui Sanae, with Rinka Kumada as Momo and Reo Matsumoto as Ayame Mizukawa. Mahito Kimura directs; the film opens in Japan on December 4.","whyItMatters":"The supporting cast is filling in around the two leads, and each addition lands in a defined slot in the story's TV station setting, which suggests the film is keeping the workplace thread that runs alongside Sui's home tutoring arrangement.","webCardHtml":"\u003cp\u003eTaisuke Niihara joins the live-action adaptation as Amamiya, an assistant producer at the TV station where Momo Sanae works. That is a supporting role, and it points to how much of the film sits inside the sister\u0026#39;s professional world rather than only around the junior high student at its center.\u003c/p\u003e\u003cp\u003eThe leads were already set: Masaki Hashimoto as Midori Yukishiro and Runa Nakajima as Sui Sanae. Mahito Kimura directs from a script by Nami Kikkawa, with Shochiku planning and distributing. The film opens in Japan on December 4.\u003c/p\u003e","blueskyPost":"Taisuke Niihara's Amamiya works at the TV station where Momo is employed, so the film's cast now carries a workplace layer alongside the sibling story.","twitterPost":"Taisuke Niihara plays Amamiya, an assistant producer at the TV station where Momo works, adding a workplace thread to the film's cast.","threadsPost":"Taisuke Niihara's role as Amamiya puts an assistant producer inside the TV station where Momo works. That gives the live-action My Sister's Boyfriend a workplace setting alongside the sibling premise, with Mahito Kimura directing the December 4 opening.","newsletterBlurb":"The live-action film of Amu Meguro's My Sister's Boyfriend has cast Taisuke Niihara as Amamiya, a new assistant producer at the TV station where Sui's older sister Momo works. Masaki Hashimoto and Runa Nakajima play the leads, with Mahito Kimura directing and Shochiku distributing. The film opens in Japan on December 4.","attributionJson":"[{\"source\":\"Anime News Network\",\"url\":\"https://www.animenewsnetwork.com/news/2026-10-06/live-action-my-sister-boyfriend-film-casts-taisuke-niihara/.242557\",\"title\":\"Live-Action My Sister's Boyfriend Film Casts Taisuke Niihara\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4551,"outputTokens":661,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1791343327,"createdAt":"2026-10-07T03:16:24.000Z","publishedAt":"2026-10-07T03:21:05.000Z","updatedAt":"2026-10-07T03:21:05.000Z"},"cluster":{"id":"c_eca026c1f175436b27637e21","canonicalTitle":"News\nLive-Action My Sister's Boyfriend Film Casts Taisuke Niihara","representativeArticleId":"a_4ffb10bc73baedc8034ad213","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"My Sister's Boyfriend\"],\"studios\":[],\"people\":[\"Taisuke Niihara\"],\"type\":\"news\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-10-07T01:51:09.000Z","lastSeenAt":"2026-10-07T01:51:09.000Z","updatedAt":"2026-10-07T03:21:05.000Z"},"attribution":[{"source":"Anime News Network","url":"https://www.animenewsnetwork.com/news/2026-10-06/live-action-my-sister-boyfriend-film-casts-taisuke-niihara/.242557","title":"News\nLive-Action My Sister's Boyfriend Film Casts Taisuke Niihara"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["My Sister's Boyfriend"],"studios":[],"people":["Taisuke Niihara"],"type":"news","domain":"other","is_roundup":false},"keyFacts":null}