Kono Juku Books Master Key Mathematics I/A/II/B + Vectors Surpasses 50,000 Copies in Six Months; 65 Unpublished Practice Problems Released Online

Gakken announced that University Entrance Exam Kono Juku Books: Master Key Mathematics I/A/II/B + Vectors, published by Gakken and released on October 9, 2025, has surpassed 50,000 copies in cumulative circulation within six months of launch. To mark the milestone, 65 additional practice problems not included in the book will be made available online from May 15, 2026. Written by Gento Kono, the book focuses not merely on explaining formulas, but on teaching reusable “thinking patterns” that can be applied across a wide range of math problems. It addresses a common challenge among exam candidates: understanding explanations but being unable to solve problems independently. The book logically explains what to focus on in a problem statement and which pattern to apply. This approach aligns with recent entrance exam trends that emphasize reasoning ability, helping drive strong demand. As a special project commemorating the 50,000-copy milestone, Gakken will publish 65 additional example exercises covering patterns 92 through 157. After studying patterns 1 through 157, readers can use these exercises to check whether they have truly internalized the thinking patterns. The recommended learning cycle is to first understand Kono’s thinking patterns through the book, then use the 65 additional online exercises to practice applying them, and finally reach a point where they can independently identify and use the right pattern for unfamiliar problems. With more than 150 carefully selected pattern-based examples and further practice through past exam questions, the book aims to become a powerful tool for students seeking admission to their target universities. Gento Kono was born in Kanagawa Prefecture in 1996 and graduated from the University of Tokyo Faculty of Medicine. While still a university student, he passed both the Japanese bar examination and the national medical examination. He founded the online learning platform Kono Juku, which has served more than 90,000 learners, and is also involved in learning content production and product development through the study goods brand RIRONE. Product details: University Entrance Exam Kono Juku Books: Master Key Mathematics I/A/II/B + Vectors, by Gento Kono, priced at 1,980 yen including tax, released October 9, 2025, A5 format, 398 pages, ISBN 978-4-05-304640-6, with an electronic edition available.