{"rewrite":{"id":"r_c3ac20d9d6de1ba92439a55a","clusterId":"c_6d38381cb31b99e8667a0595","slug":"shogakukan-scandal-widens-as-second-convicted-creator-found-on-mangaone","model":"deepseek-v4-flash","headline":"Shogakukan Scandal Widens as Second Convicted Creator Found on MangaOne","summary":"TheOASG Podcast reports that Shogakukan's MangaOne editorial department admitted it allowed manga creator Shoichi Yamamoto to publish under a pen name after his 2020 arrest and conviction for a sex crime. The department also hid his past from the artist drawing the series. Shogakukan later revealed that Tatsuya Matsuki, the act-age writer convicted in 2020, was also working on the service under a pen name. An investigative committee with lawyers has been formed.","whyItMatters":"The revelation that Shogakukan's MangaOne platform harbored a second convicted sex offender under a pseudonym, after already apologizing for the first case, suggests a systemic failure in editorial oversight rather than an isolated incident.","webCardHtml":"\u003cp\u003eThe Shogakukan scandal deepened over the weekend as the publisher confirmed that not one but two manga creators convicted of sex crimes had been working on its MangaOne platform under pen names. The editorial department first apologized on Friday for allowing Shoichi Yamamoto, arrested and convicted in 2020, to write the series Joujin Kamen under the name Hajime Ichiro starting in 2022. The editor involved allegedly tried to strike a deal with the victim and kept the artist, Eri Tsuruyoshi, unaware of Yamamoto's past. Multiple manga artists, including some working for Shogakukan, demanded their works be removed from MangaOne in protest. The following day, Shogakukan announced an investigative committee including lawyers. Then, while continuing its internal investigation, the publisher revealed that Tatsuya Matsuki, the act-age writer convicted in 2020 and dismissed from Shonen Jump with the cancellation of that manga, had been working on Seisō no Shinri-shi under the pen name Miki Yatsunami.\u003c/p\u003e","blueskyPost":"Shogakukan's MangaOne scandal grows: a second convicted sex offender, act-age writer Tatsuya Matsuki, was working under a pen name. An investigative committee has been formed.","twitterPost":"Shogakukan's MangaOne scandal deepens: after apologizing for hiding Shoichi Yamamoto's conviction, the publisher reveals act-age writer Tatsuya Matsuki was also working under a pen name. Investigative committee formed.","threadsPost":null,"newsletterBlurb":"Shogakukan's MangaOne scandal expanded over the weekend. After the editorial department apologized for allowing convicted sex offender Shoichi Yamamoto to publish under a pen name, the publisher revealed that act-age writer Tatsuya Matsuki, also convicted in 2020, was working on the same service under a different pseudonym. An investigative committee with lawyers has been established.","attributionJson":"[{\"source\":\"TheOASG\",\"url\":\"https://www.theoasg.com/podcasts/its-not-my-fault-the-oasg-podcast-is-not-popular/episode-238-talk-about-shogakukan-scandal/33608\",\"title\":\"TheOASG Podcast Episode 238: We Talk About The Shogakukan Scandal\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4203,"outputTokens":684,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1780232647,"createdAt":"2026-05-31T12:50:01.000Z","publishedAt":"2026-05-31T12:54:33.000Z","updatedAt":"2026-05-31T12:54:33.000Z"},"cluster":{"id":"c_6d38381cb31b99e8667a0595","canonicalTitle":"TheOASG Podcast Episode 238: We Talk About The Shogakukan Scandal","representativeArticleId":"a_3e09061f5a19c78b9a34e154","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[\"Medalist\",\"Uma Musume: Beginning of a New\"],\"manga_titles\":[],\"work_titles\":[],\"studios\":[],\"people\":[],\"type\":\"news\",\"domain\":\"industry\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-03-03T17:00:00.000Z","lastSeenAt":"2026-03-03T17:00:00.000Z","updatedAt":"2026-05-31T12:54:33.000Z"},"attribution":[{"source":"TheOASG","url":"https://www.theoasg.com/podcasts/its-not-my-fault-the-oasg-podcast-is-not-popular/episode-238-talk-about-shogakukan-scandal/33608","title":"TheOASG Podcast Episode 238: We Talk About The Shogakukan Scandal"}],"entities":{"anime_titles":["Medalist","Uma Musume: Beginning of a New"],"manga_titles":[],"work_titles":[],"studios":[],"people":[],"type":"news","domain":"industry","is_roundup":false},"keyFacts":["The editorial department hid Yamamoto's criminal past from the artist drawing the series, Eri Tsuruyoshi.","Shogakukan later revealed that Tatsuya Matsuki, the act-age writer convicted in 2020, had been working on Seisō no Shinri-shi under the pen name Miki Yatsunami on MangaOne.","Multiple manga artists demanded their works be removed from MangaOne in protest after the Yamamoto revelation.","Shogakukan formed an investigative committee including lawyers to look into the matter."]}