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Chuya Koyama’s Uchu Kyoudai ( Space Brothers ) Vol. 46 hits No. 1 on the Billboard Japan Book Hot 100, on the chart released July 30.
The volume is the concluding installment of the award-winning manga, serialized in Morning magazine since 2008. The title sweeps brick-and-mortar, e-commerce (EC) and e-books this week.
Debuting at No. 2 is the latest volume of the Square Enix manga adaptation of Kusuriya no Hitorigoto ( The Apothecary Diaries ), with three metrics landing in the top 10: brick-and-mortar, EC (No. 2 respectively), and e-books (No. 10). Tsurumaikada’s Medalist Vol. 15 follows at No. 3, powered by e-books (No. 2), brick-and-mortar (No. 3) and EC (No. 10).
Popular mystery writer Haruo Yuuki’s latest novel Rakuen , released July 23, enters at No. 12 in its first partial tracking week, topping the social media metric and collecting points across brick-and-mortar, EC and e-books. Its first full tracking week next chart cycle will be one to watch.
The Billboard Japan Book Hot 100 is a comprehensive chart combining physical sales, e-books, library loans, subscription data and social media activity. Below are the top 10 titles on this week’s list, tracking the period from July 20 to 26.
(Numbers in parentheses indicate the title’s metric placements for brick-and-mortar, EC, e-books, subscriptions, and social media, top 20 only. English title given if translations or adaptations exist.)
1. Uchu Kyoudai ( Space Brothers ) Vol. 46, Chuya Koyama (1/1/1/–/–)
2. Kusuriya no Hitorigoto ( The Apothecary Diaries ) Vol. 17 (Comic Edition), Hyuuganatsu, Nekokurage, Itsuki Nanao (2/2/10/–/–)
3. Medalist Vol. 15, Tsurumaikada (3/10/2/–/–)
4. HUNTER×HUNTER Vol. 39, Yoshihiro Togashi (6/–/4/–/–)
5. ONE PIECE Vol. 115, Eiichiro Oda (4/15/–/–/–)
6. GIANT KILLING Vol. 70, Tsujitomo, Masaya Tsunamoto (7/18/5/–/–)
7. One-Punch Man Vol. 37, ONE, Yusuke Murata (–/–/3/–/–)
8. Shuumatsu no Warukyure ( Record of Ragnarok ) Vol. 28, Azychika, Shinya Umemura, Takumi Fukui (5/–/–/–/–)
9. Shangri-La Frontier Vol. 27, Katarina, Ryosuke Fuji (8/–/19/–/–)
10. Present , Kotaro Isaka, Kaori Ekuni, Miyuki Miyabe, Sonoko Machida, Honobu Yonezawa, Kaho Nashiki, Riku Onda (11/14/–/–/13)
Indexed and credited by AIPROPX. Originating outlet: Billboard. Open at source →
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AIPROPX has consolidated 1 report from 1 outlet into a single canonical entry on “Final Volume of ‘Space Brothers’ Tops Billboard Japan Book Hot 100.” Every covered outlet is based in Other.
The only timestamped report came from Billboard (Aug 3, 2026, 18:39 UTC).
2 statements are carried by only one outlet within this set and are not echoed by the others.
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AIPROPX — “Final Volume of ‘Space Brothers’ Tops Billboard Japan Book Hot 100” · https://www.aipropx.com/story/dc9d750cbda830a3029cef6270ecd5bf
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