Yasuhisa Hara's manga series "Kingdom" held the top spot on the Billboard Japan Book Hot 100 for a second consecutive week with its 80th volume, according to the chart released on 3 September. The chart, which combines physical sales, e-books, library loans, subscriptions and social media activity, offers a broad measure of the most popular reading material in Japan for the tracking period of 24-30 August.

Kingdom Vol. 80 ranked first in brick-and-mortar sales, second in e-books and 17th in e-commerce. The manga adaptation of Zatsuyo Fuyojutsu-shi ga Jibun no Saikyou ni Kizuku made debuted at No. 2, topping the e-books metric ahead of a planned 2027 anime adaptation, while Keigo Higashino's posthumous novel Eien no Kioku climbed to No. 3. Notably, Chiikawa: Nanka Chiisakute Kawaii Yatsu Vol. 8 leapt from No. 73 to No. 11, boosted by its "Siren Arc" storyline, which inspired the hit film Chiikawa the Movie: The Secret of Mermaid Island, now grossing over 10 billion yen at the Japanese box office.