Ryo Asai’s In the Megachurch hits No. 1 on the Billboard Japan Book Hot 100 list released April 23 — its first time atop the chart in 25 weeks on the tally. The novel, which weaves together three characters’ contrasting experiences around Japan’s “oshikatsu” culture (devoted fan support for a favorite celebrity or character), won the top prize at the 2026 Hon’ya Taisho (Japan Booksellers’ Award), announced on April 9. The title held at No. 1 on the social media metric while improving on last week’s positions in brick-and-mortar, e-commerce (EC) and subscriptions. Tatsuya Endo’s SPY×FAMILY Vol. 17 stays in the top 3 for a third consecutive week at No. 2. Debuting at No. 3 is Muneyuki Kaneshiro and Yusuke Nomura’s Blue Lock Vol. 38. Ao Kojima’s Hon nara Uru Hodo Vol. 3 enters at No. 4. Set in a small secondhand bookshop called Jugatsu-do, the human drama manga scores in the top 20 across four metrics: No. 3 in brick-and-mortar, No. 4 in EC, No. 17 in e-books and No.…