<Golden Week> Mystery Solving at Osaka Castle, Featured in the Historical Drama 'Toyotomi Brothers!' 'Odekake Plus+' Launches New Osaka Castle Park Content!

Zoshindo-Jukenyunkyusha Co., Ltd. (Headquarters: Nishi-ku, Osaka; President: Taiji Okamoto) will release its third installment of 'Odekake Plus+,' an experiential content that crosses outings with learning, featuring 'Osaka Castle Park' on April 23, 2026, ahead of the Golden Week and fresh green season.

Launched in September 2025, the dedicated 'Odekake Plus+' website (https://www.manavi.zoshindo.co.jp/odekake/) offers quests (quizzes) set in various outing spots in Osaka, including cultural facilities. Participants choose quests following an original adventure story surrounded by unique characters and challenge themselves to solve mysteries by gathering clues at the site. It can be enjoyed by children and parents like a quiz rally.

● What is Odekake Plus+? 'Odekake Plus+' is a new-sense learning content proposed by Zoshindo-Jukenyunkyusha, an educational publisher celebrating its 135th anniversary. Participants visit outing spots in Osaka and solve quests prepared on the website while looking for clues in the scenery or exhibits.

● How to Play Follow the quest instructions on the smartphone website while exploring the real-world locations.

● Highlights: Osaka Castle Park Joins the Map Quests are created in collaboration with cultural facilities. In the newly added 'Osaka Castle Park,' participants will explore quests related to the Toyotomi family, historical figures, lifestyles of the time, and castle secrets through exhibits at the Osaka Castle Main Keep and the Toyotomi Ishigaki Museum.

・Osaka Castle Park (Chuo-ku, Osaka) ... Released on April 23, 2026

● Features of Odekake Plus+ - Engaging Worldview: A story and characters (designed by popular illustrator Sano-suke Sakuma) ensure children can participate without feeling like they are 'studying.' - Educational Hooks: The publisher's expertise is used to spark curiosity and link the experience to school learning even after the quest is completed.

● Expanding Locations Currently available at: - Osaka City Museum of Natural History - Expo '70 Commemorative Park - National Museum of Ethnology - Osaka Museum of Housing and Living - Osaka City Sewerage Science Museum

The company plans to continue expanding the number of featured facilities to various cultural and commercial spots in Osaka.

● About Zoshindo-Jukenyunkyusha An educational publisher founded in 1890. It established the genre of comprehensive study guides with the concept of 'everything you want to know' and has sold over 27 million copies of its leading series.