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RIKU
RIKU is an AI-powered novel writing support service jointly developed by KADOKAWA and Hatena, currently in closed beta application phase. The service is designed to support authors through dialogue rather than generate the work itself, and user works will not be used for AI training.
Synthesized from 5
Yomimono stories · updated
Aug 5
KADOKAWA and Hatena announced RIKU, an AI-powered novel writing support service, and opened applications for a closed beta test. The application period runs until 23:59 on Monday, August 17, and is open to people aged 18 and over who are writing novels or want to write in the future. The service is designed not to have generative AI write the work itself, but to support the author through dialogue, helping with character and worldview construction, idea organization, and proofreading and editing.
RIKU operates under the theme "You write the story. A partner by your side," positioning the AI as a companion that listens and helps organize thoughts, while the user remains the main entity writing the story and text. Works created or input by users on the service will not be used for AI learning, addressing concerns about training data. The development combines KADOKAWA's editorial expertise, gained through dialogue with authors, with Hatena's experience in user-generated content services like Hatena Blog.
The two companies previously collaborated on the web novel site Kakuyomu since 2016. The closed beta test will be available on Windows, Mac, smartphones, and tablets, and a free Google account is required to apply.
Key facts
- Developer
- KADOKAWA and Hatena ↗
- Service type
- AI-powered novel writing support service ↗
- Application deadline
- 23:59 on Monday, August 17 ↗
- Eligibility
- People aged 18 and over who are writing novels or want to write in the future ↗
- AI role
- Supports the author through dialogue, not generative writing ↗
- User data policy
- Works created or input by users will not be used for AI learning ↗
- Platforms
- Windows, Mac, smartphones, and tablets ↗
- Prior collaboration
- KADOKAWA and Hatena collaborated on Kakuyomu since 2016 ↗
Timeline
Synthesized by Yomimono from the cited Yomimono stories below, each itself
sourced, then editorially reviewed. Every
fact links the story it came from.
Facts
- Announced
- joint development and closed beta test applications · 2026-08-04
- Release
- game · closed beta test application period until August 17, 2026 · 2026-08-04
Connections
Structured graph also available as JSON at /public/entities/riku.
CC BY 4.0.
All coverage
Sep 17
Cinema Today reports an interview video with lead actor Yuya Yagira and making-of footage for 'RYUJI Ryuji,' the remake of the 1983 yakuza film 'Ryuji' that opens October 30. Yagira discusses building the role with director Nobuo Mizuta and acting alongside Riku Hagiwara and BE:FIRST's JUNON. An official manga adaptation by Kosuke Tokimune begins serialization September 27 on 'Manga BANG Comics.'
Sep 16
France's Ankama opened a website on Wednesday for Aoki Densho Welsh & Shedar, an original television anime set to premiere October 2 on Tokyo MX at 9:25 p.m. JST. The site named Rikuya Yasuda as Welsh, a 16-year-old from Broccoli village, and Yuki Kaji as Shedar, the 16-year-old prince of Bonta. Naoki Horiuchi directs at Studio Massket.
Sep 4
The four voice actors behind QUARTET NIGHT, Shouta Aoi, Shoutarou Morikubo, Tatsuya Suzuki, and Tomoaki Maeno, posted a photo together on X on September 4. The shot shows them in costumes from the June 2026 live event QUARTET NIGHT LIVE ENDLESS JEWELS, with a bracelet from the event merchandise visible. The reason for the gathering is unconfirmed, and fans are speculating about a new project or bonus footage.
Aug 28
TBS's documentary program Jounetsu Tairiku will feature horror writer Suneji, who became a symbol of the recent horror boom after her debut web novel, About a Certain Place in the Kinki Region, surpassed 22 million page views and later sold over 1 million copies as a book. The show followed her since May, capturing her daily life and work during the busy midsummer horror season. It airs August 30 at 23:10 on MBS/TBS, with streaming on TVer.
Aug 19
The staff for Dark Machine the Animation unveiled the second promotional video on Wednesday. The video reveals four new cast members playing players from rival e-sports teams, previews the opening theme song "Sonzai Riyū Kai" by BUCK-TICK, and announces the anime's October television premiere. The series will be available for TV and streaming via Fuji TV.
Aug 5
The staff for Baki THE GRAPPLER STAGE announced on Tuesday that the spinoff manga Baki Gaiden: Retsu Kaioh wa Isekai Tensei Shitemo Ikkō ni Kamawan is getting a stage play adaptation. The show runs March 19-22, 2027 at Owl Spot in Tokyo, with Riku Noma reprising his role as Retsu Kaioh.
Aug 4
KADOKAWA and Hatena announced the joint development of RIKU, an AI-powered novel writing support service, and opened applications for a closed beta test. The application period runs until 23:59 on Monday, August 17, and is open to people aged 18 and over who are writing novels or want to write in the future. RIKU is designed not to have generative AI write the work itself, but to support the author through dialogue, helping with character and worldview construction, idea organization, and proofreading and editing. The service operates under the theme "You write the story. A partner by your side," positioning the AI as a companion that listens and helps organize thoughts, while the user remains the main entity writing the story and text. Works created or input by users on the service will not be used for AI learning, addressing concerns about training data. The development combines KADOKAWA's editorial expertise, gained through dialogue with authors, with Hatena's experience in user-generated content services like Hatena Blog. The two companies previously collaborated on the web novel site Kakuyomu since 2016. The closed beta test will be available on Windows, Mac, smartphones, and tablets, and a free Google account is required to apply.
Jul 27
Shōnengahōsha announced on July 27 that Sho Kasugai's manga Millennium Family is getting a television anime adaptation. The anime will air on TBS and other stations, though a debut date has not been revealed. Masato Jinbo, known for directing Fate/kaleid liner Prisma Illya 2wei! and The Rising of The Shield Hero Season 2, is directing the series at studio PartsCraft and also supervising the scripts. Hiroshi Yoneda, who worked on Fate/kaleid liner Prisma Illya: Vow in the Snow, is handling character design and serving as chief animation director. Rikuya Yasuda voices the protagonist Theo. The manga launched in Young King Ours magazine in March 2021 and has eight compiled volumes released so far, with the ninth volume set for July 30, 2026. The story follows seven immortal siblings born in England who possess eternal life, making them targets for criminals, hospitals, and military organizations. AI localization company Orange Inc. licenses the manga in English through its e-bookstore service emaqi.
Jun 27
McDonald's Japan previewed new commercials for its annual summer Big Mac campaign, using scenes from Mamoru Hosoda's The Girl Who Leapt Through Time, Summer Wars, and Wolf Children. Figure skaters Riku Miura and Ryuichi Kihara and Sakurazaka46 member Hikaru Morita appear in live-action segments. The ads revive the 1980s Coca-Cola jingle "I feel Coke" and begin airing June 30.
Jun 25
TV Asahi announced nine new regular cast members for its Thursday drama 'Dai Kūkō ~GATE24~,' starring Shuri, including Kaoru Okunuki, Sayaka Akimoto, Masaki Kaji, Shion Machida, Riku Kashima, Naoto Nishimura, Haru Tsubakihara, Seiichi Tanabe, and Mitsuru Fukikoshi. The series will also be distributed worldwide on Netflix. It premieres July 23.
May 16
The ongoing television anime I Made Friends with the Second Prettiest Girl in My Class revealed a third promotional video and three new cast members on Tuesday. ASMIK Ace announced the additions. Rikuya Yasuda joins as Nozomu Seki, a classmate of protagonist Maki Maehara. Shinji Kawada plays Itsuki Maehara, Maki's father. Yurina Amami voices Kyoka Minato, a subordinate of Itsuki. The new trailer features the reGretGirl song "Hi no Ataru Kotoba" from 2025. The series premiered on Tokyo MX on April 7 and streams on Crunchyroll. Hideki Tachibana directs at studio CONNECT, with Keiichirō Ōchi writing the scripts and Shoko Takimoto designing the characters. The story follows isolated student Maki Maehara after he befriends popular classmate Umi Asanagi at a video store. Takata launched the original light novel on Kadokawa's Kakuyomu platform in November 2020, and Kadokawa's Sneaker Bunko imprint began publishing it in print in December 2021. Rin Ono's manga adaptation runs on the Comic Alive+ website.