{"rewrite":{"id":"r_01999a3dcfbd4d2c96d676ee","clusterId":"c_2e3cb27e7bcc4017a5b5e1a9","slug":"iwamoto-senpai-no-suisen-anime-adds-cast-theme-songs-sets-july-4-premiere","model":"deepseek-v4-flash","headline":"Iwamoto-senpai no Suisen Anime Adds Cast, Theme Songs, Sets July 4 Premiere","summary":"The television anime adaptation of Hiroshi Shiibashi's manga Iwamoto-senpai no Suisen has announced two new supporting cast members and its theme songs, along with a July 4 premiere date. Voice actors Gen Satou and Shinnosuke Tokudome join the cast as Ryuu Sazame and Mizuka Awatama, respectively. Japanese boy-band THE JET BOY BANGERZ performs the opening theme \"BUDDING,\" and WOLF HOWL HARMONY performs the ending theme \"Koko ni Iru.\" The anime will air on Tokyo MX at 10:30 p.m. and on Sun TV every Saturday starting July 4. Toshifumi Kawase directs the series at Studio Deen, with Keiichirou Oochi handling series composition, Atsuko Nakajima designing characters, and Yoshiaki Dewa and Toru Ishitsuka composing the music. The previously announced main cast includes Taito Ban as Kodo Iwamoto, Yuki Sakakibara as Kai Haramachi, and Kento Ito as Soichiro Amaba, among others. Shiibashi began the manga as a one-shot in Shonen Jump+ in March 2020 before it began regular serialization in Ultra Jump in February 2021. Shueisha published the 13th volume on January 19, with the 14th volume scheduled for July 17.","whyItMatters":"The July 4 premiere date places the series in the competitive summer 2026 season, with the involvement of Studio Deen and a director known for Yakuza Fiancé signaling a production with established genre experience.","webCardHtml":"\u003cp\u003eGen Satou, known for his role as Chrome in \u003cem\u003eDr. Stone\u003c/em\u003e, voices Ryuu Sazame. Shinnosuke Tokudome, who voiced Wada in \u003cem\u003eLet's Go Karaoke!\u003c/em\u003e, plays Mizuka Awatama. The previously announced main cast includes Taito Ban as Kodo Iwamoto, Yuki Sakakibara as Kai Haramachi, Kento Ito as Soichiro Amaba, Akira Ishida as Bokyo Kitsujo, Masaya Fukunishi as Oni Okuaki, and Takuma Nagatsuka as Shizuma Aonuma.\u003c/p\u003e\n\u003cp\u003eDirector Toshifumi Kawase previously helmed \u003cem\u003eYakuza Fiancé: Raise wa Tanin ga Ii\u003c/em\u003e. Series composer Keiichiro Ochi worked on \u003cem\u003eThe Angel Next Door Spoils Me Rotten\u003c/em\u003e. Character designer Atsuko Nakajima contributed to \u003cem\u003eKomi Can't Communicate\u003c/em\u003e and the \u003cem\u003eRanma 1/2\u003c/em\u003e remake. Music composers Yoshiaki Dewa and Toru Ishitsuka have credits on \u003cem\u003eJigokuraku\u003c/em\u003e and \u003cem\u003eKuro no Su: Chronus\u003c/em\u003e, respectively.\u003c/p\u003e\n\u003cp\u003eThe manga is written by Hiroshi Shiibashi, creator of \u003cem\u003eNura: Rise of the Yokai Clan\u003c/em\u003e. The story follows Kodo Iwamoto, a middle school student in an army-controlled early 20th century school who investigates supernatural phenomena. He encounters a boy with a special power and offers him a recommendation letter to join the school.\u003c/p\u003e","blueskyPost":"THE JET BOY BANGERZ and WOLF HOWL HARMONY, both Japanese boy-bands, perform the theme songs. Their involvement signals the anime's target demographic.","twitterPost":"THE JET BOY BANGERZ and WOLF HOWL HARMONY, both boy-bands, handle the theme songs. The music choices target a young female audience.","threadsPost":"The theme song artists for Iwamoto-senpai no Suisen are THE JET BOY BANGERZ and WOLF HOWL HARMONY, both Japanese boy-bands. That music direction, paired with Studio Deen's romance pedigree, suggests the adaptation is courting the same young female viewership that sustained the manga.","newsletterBlurb":"Iwamoto-senpai no Suisen has set a July 4 premiere date and announced its supporting cast and theme songs. Gen Satou and Shinnosuke Tokudome join the series, with THE JET BOY BANGERZ and WOLF HOWL HARMONY providing the music.","attributionJson":"[{\"source\":\"MyAnimeList\",\"url\":\"https://myanimelist.net/news/74284105\",\"title\":\"'Iwamoto-senpai no Suisen' Announces Supporting Cast, Theme Songs\"},{\"source\":\"Anime Trending\",\"url\":\"https://anitrendz.net/news/2026/05/29/iwamoto-senpai-no-suisen-reveals-main-theme-songs-new-cast-members-july-4-debut-date\",\"title\":\"Iwamoto-senpai No Suisen Reveals Main Theme Songs, New Cast Members \u0026 July 4 Debut Date\"}]","lintFlagsJson":"[]","lintHits":0,"costUsd":0,"inputTokens":9491,"outputTokens":1344,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1780079488,"createdAt":"2026-05-29T18:31:18.000Z","publishedAt":"2026-05-29T18:45:51.000Z","updatedAt":"2026-05-29T18:45:51.000Z"},"cluster":{"id":"c_2e3cb27e7bcc4017a5b5e1a9","canonicalTitle":"'Iwamoto-senpai no Suisen' Announces Supporting Cast, Theme Songs","representativeArticleId":"a_0f40d13e835f8df3a05968bb","sourceCount":2,"writtenSourceCount":2,"writeAttempts":0,"isSolo":false,"entitiesJson":"{\"anime_titles\":[\"Iwamoto-senpai no Suisen\"],\"manga_titles\":[\"Iwamoto-senpai no Suisen\"],\"work_titles\":[],\"studios\":[],\"people\":[\"Hiroshi Shiibashi\",\"Gen Satou\",\"Shinnosuke Tokudome\"],\"type\":\"announcement\",\"domain\":\"anime\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-05-29T10:05:47.000Z","lastSeenAt":"2026-05-29T18:10:56.000Z","updatedAt":"2026-05-29T18:45:51.000Z"},"attribution":[{"source":"Anime Trending","url":"https://anitrendz.net/news/2026/05/29/iwamoto-senpai-no-suisen-reveals-main-theme-songs-new-cast-members-july-4-debut-date","title":"Iwamoto-senpai No Suisen Reveals Main Theme Songs, New Cast Members \u0026 July 4 Debut Date"},{"source":"MyAnimeList","url":"https://myanimelist.net/news/74284105","title":"'Iwamoto-senpai no Suisen' Announces Supporting Cast, Theme Songs"}],"entities":{"anime_titles":["Iwamoto-senpai no Suisen"],"manga_titles":["Iwamoto-senpai no Suisen"],"work_titles":[],"studios":[],"people":["Hiroshi Shiibashi","Gen Satou","Shinnosuke Tokudome"],"type":"announcement","domain":"anime","is_roundup":false},"keyFacts":["The anime adaptation of Hiroshi Shiibashi's manga Iwamoto-senpai no Suisen premieres on July 4 on Tokyo MX at 10:30 p.m. and on Sun TV every Saturday.","Gen Satou, who voiced Chrome in Dr. Stone, joins the cast as Ryuu Sazame. Shinnosuke Tokudome, who voiced Wada in Let's Go Karaoke!, plays Mizuka Awatama.","Japanese boy-band THE JET BOY BANGERZ performs the opening theme 'BUDDING.' WOLF HOWL HARMONY performs the ending theme 'Koko ni Iru.'","Toshifumi Kawase, director of Yakuza Fiancé: Raise wa Tanin ga Ii, directs the series at Studio Deen. Keiichirou Oochi handles series composition, and Atsuko Nakajima designs characters."]}