The upcoming anime adaptation of Keiichirō Shibuya’s Introduction to Mineralogy manga, also known as Ruri no Hōseki or Ruri Rocks, has revealed exciting new details in a recently released promotional video. Fans can look forward to more staff announcements, a preview of the theme songs, and the confirmed premiere date of July 6, 2025. This “science adventure” slice-of-life comedy, produced by Studio Bind, promises to blend mineralogy lessons with a lighthearted romp through mountains, rivers, and caves.
Digging Deeper: What to Expect
Premiere Date and Where to Watch
Introduction to Mineralogy is set to premiere on July 6, 2025, first on the AT-X channel at 9:00 p.m. JST (8:00 a.m. EDT). Following its debut, the anime will also air on Tokyo MX channel at 9:30 p.m. JST, BS11 at 10:30 p.m. JST, ABC TV, and TV Aichi on July 9.
While official streaming details are yet to be confirmed, Crunchyroll or Netflix are potential platforms, given Aniplex’s involvement.
Theme Songs Revealed
The promotional video unveils and previews the opening and ending theme songs. Rei Yasuda performs the opening theme song, “Hikari no Sumika” (Home of Light), while Hana Hope sings the ending theme song, “Sapphire.”
Additional Staff Members
The anime’s production team includes:
- Director: Shingo Fujii (ONIMAI: I’m Now Your Sister!)
- Series Composition: Michiko Yokote (Shirobako, Prison School, Princess Tutu)
- Character Design: Mayu Fujii (Mushoku Tensei: Jobless Reincarnation II episode animation director)
- Music: Daisuke Achiwa and Kazuki Yanagawa
- Assistant Director: Yasuhiko Akiyama
- Chief Animation Directors: Mayu Fujii and Kazuhiro Ōta
- Prop Design: Ayumi Ninomiya and Anzu Nakai
- Mineral Design: CLUSELLER
- Art Director: Shunichirō Yoshihara
- Art Setting: Kazushi Fujii
- Color Key Artist: Makiko Doi
- Compositing Director of Photography: Takuya Ogata
- Editing: Yūji Oka
- Sound Effects: Takuya Hasegawa
- Sound Production: Bit Grooove Promotion
Voice Cast
The cast includes:
- Miyari Nemoto as Ruri Tanigawa
- Asami Seto as Nagi Arato
- Yume Miyamoto as Yōko Imari
- Saki Hayashi as Shōko Seto
- Misuzu Yamada as Aoi Kasamaru
The Story: Ruri’s Gemstone Journey
Introduction to Mineralogy follows Ruri Tanigawa, a high school student with a passion for jewelry and accessories. She meets Nagi Arato, a mineralogy graduate student, who introduces her to the world of mineral collecting. Armed with tools and maps, Ruri explores mountains, rivers, and caves, discovering quartz, garnet, pyrite, gold sand, and fluorite. The series blends education with comedy, showcasing “cute girls doing esoteric hobbies,” reminiscent of Amanchu! but with rocks instead of scuba gear.
Manga Origins
The anime is based on Keiichirō Shibuya’s manga, which began serialization in Enterbrain’s Harta magazine in August 2019. The manga concluded with its fifth volume in September 2024.
Studio Bind: The Animators
Studio Bind, known for its work on Mushoku Tensei: Jobless Reincarnation, is producing the anime. Founded in November 2018 as a joint venture between White Fox and Egg Firm, Studio Bind has quickly gained recognition for its high-quality animation.
Advance Screening Event
An advance screening of the first episode will be held on June 28 in Tokyo, Japan. The event will feature a talk show with the main voice cast members: Miyari Nemoto (Ruri), Asami Seto (Nagi), Yume Miyamoto (Yoko), and Saki Hayashi (Shoko).
