Eikoh Seminar x RIDDLER: Major Cram School and Puzzle Creator Group Collaborate on "Puzzle Foundational Intelligence Type Diagnosis 2026 Spring," Released April 27

Eikoh Seminar, a cram school operated by Eikoh Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo; President: Katsuaki Shimoda), a group company of Z-kai Holdings Inc., has collaborated with RIDDLER Inc. (Headquarters: Toshima-ku, Tokyo; Representative Director: Ryogo Matsumaru), led by puzzle creator Ryogo Matsumaru, to release "Puzzle Foundational Intelligence Type Diagnosis 2026 Spring" on Monday, April 27, 2026. This content can be enjoyed for free by anyone on their smartphone. This project is the third installment of a highly popular series that has garnered significant attention from a wide range of ages, from elementary school students to adults. Its previous two iterations saw "#PuzzleFoundationalIntelligenceTypeDiagnosis" trend on X (formerly Twitter) in Japan. We invite you to challenge this eagerly awaited new edition. See Details 20 original new puzzles, 15-minute time limit What's needed for the puzzles is not knowledge, but "inspiration." Therefore, the content is enjoyable for anyone from elementary school students to adults. Challenge yourself, your family, and friends to see how many puzzles you can solve within the exquisite 15-minute time limit. All the puzzles in this edition are newly created specifically for this project. Sample Questions 8 types in total! Comes with diagnostic results that reveal your foundational intelligence type The puzzles are divided into five categories: "Multidimensional Thinking," "Logical Thinking," "Trial-and-Error Ability," "Interpretation and Expression Skills," and "Creativity." Your thinking habits and characteristics are determined based on the number of correct answers in each category. The diagnostic results will display a "Foundational Intelligence Chart" showing your strength in each category, along with eight foundational intelligence types such as "Entrepreneur Type," "IT Engineer Type," and "Creator Type." Anyone can enjoy it for free on smartphones and PCs "Puzzle Foundational Intelligence Type Diagnosis" is content that anyone, from elementary school students to adults, can enjoy for free on their smartphones or PCs. * Internet connection fees and communication charges are the responsibility of the user. * Entry requires inputting an email address, etc. Implementation Overview Monday, April 27, 2026 Entry from the "Puzzle Foundational Intelligence Type Diagnosis" special page on the Eikoh Seminar official website. * Entry requires inputting an email address, etc. Free * Internet connection fees and communication charges are the responsibility of the user. Elementary school students to adults "Puzzle Foundational Intelligence Type Diagnosis" Special Page Eikoh Seminar Eikoh Seminar is a leading cram school in Japan, primarily operating in the Tokyo metropolitan area, offering small-group instruction for junior and senior high school entrance exams. It provides face-to-face guidance where students learn and compete with classmates in small classes, enabling strategic exam preparation that leverages each individual's strengths. Eikoh Seminar Official Website RIDDLER Inc. Established in 2019. Led by Ryogo Matsumaru, who is active in many TV programs, RIDDLER is a puzzle creator group originating from the University of Tokyo, creating puzzles across various media. With the motto "To create the best 'aha!' experiences and make everyone love thinking," they are widely active in TV, books, events, regional revitalization, and educational projects. In 2023, they opened "RIDDLABO," an inspiration-based learning塾 for elementary school students, specializing in fostering the "foundational intelligence" necessary for the coming era. RIDDLER Official Website Eikoh Co., Ltd. Company Profile Operates cram schools such as "Eikoh Seminar" for junior and senior high school entrance exams, "Eikoh no Kobetsu Vis-a-Vis" for individualized instruction to achieve goals, and "Daigaku Juken Navio" for university entrance exam preparation, primarily in the Tokyo metropolitan area. As one of Japan's largest cram schools, it serves many students. It also offers "EIKOH LiNKSTUDY," a cram school specializing in online classes for junior high, high school, and university entrance exam guidance. It not only motivates students to learn and fosters self-learning attitudes but also effectively guides them to success in junior high, high school, and university entrance exams by leveraging abundant data and experience. Additionally, it operates STEM education businesses, including specialized science experiment classes and robot/programming classes. Headquarters: 2-11-11 Fujimi, Chiyoda-ku, Tokyo Representative: Katsuaki Shimoda, President and Representative Director Established: July 1980 [Inquiries from media regarding this release] Z-kai Holdings Inc. Public Relations: Watanabe, Otake Phone: 03-5275-1685 Email: prooffice@zkai-hd.co.jp