Key visual for "7-Day Masterpiece Reading Challenge" Sanseido Book Store Co., Ltd. (Head Office: Chiyoda-ku, Tokyo) and Suntory Wellness Ltd. (Head Office: Minato-ku, Tokyo), following the success of the "Masterpiece Reading Challenge" held in April 2026, will launch the second edition, "2026 Akutagawa Prize and Naoki Prize (Award-Winning Works) Recommended Masterpieces Edition," from Wednesday, July 1, 2026. This project, timed with the announcement of the Akutagawa Prize and Naoki Prize scheduled for Wednesday, July 15, focuses on 100 masterpieces selected by Sanseido Book Store from past award-winning works. It is a project designed to engage with brain health in an enjoyable way, alongside the literary masterpieces that have been loved by many readers. This project is part of "Otona no Nōkatsu Club" (Adult Brain Activity Club), a community initiative promoted by Suntory Wellness that allows participants to learn about and experience "things good for the brain" in a fun way. It focuses on the research that "reading is good for the brain" (Source 2) in line with "building a brain that enjoys life," advocated by "Omega Aid PLUS (Omega Aid Plus)," the No. 1 supplement in the cognitive function support market (Source 1). *1 Source: HB Food Marketing Handbook 2026 Functional Foods Edition > Fuji Keizai Co., Ltd. *2 Source: Int Psychogeriatr. 2021 33:63-74. ■ About "Masterpiece Reading Challenge 2026 Akutagawa Prize and Naoki Prize (Award-Winning Works) Recommended Masterpieces Edition" ➢ Implementation Period: Wednesday, July 1, 2026 – Monday, August 31, 2026 ➢ Locations: Sanseido Book Store Kanda Jimbocho Main Store, Yurakucho Store, Kyodo Store, Seijo Store, Ikebukuro Main Store, Atre Akihabara 1, Tokyo Solamachi Store, Atre Ueno Store, Ebina Store, Omiya Store, Sogo Chiba Store ➢ Target Works: 100 masterpieces selected by Sanseido Book Store from past Akutagawa Prize and Naoki Prize award-winning works. In the "Masterpiece Reading Challenge," customers in the "adul