Conquer the "Big Wall" of Arithmetic, Written Calculation, with Manga! A New Type of Educational Manga Appears from the Unko Drill Series, Which Has Sold Over 13 Million Copies!

Bunkyosha Co., Ltd. (Representative Director and President: Shuji Yamamoto) will release two new books from the "Unko Drill Learning Manga" series, which allows elementary school students to learn difficult subjects in a fun manga format. These two books, "Unko Drill Learning Manga: Multiplication Written Calculation for 3rd Graders" and "Unko Drill Learning Manga: Division Written Calculation for 4th Graders," will be available nationwide at bookstores and online stores on April 9, 2026.

### Written Calculation is the "First Wall" in Children's Arithmetic Written calculation, which is learned in the 3rd and 4th grades of elementary school, is said to be the "first wall" where many children begin to feel a dislike for arithmetic, as the procedure for solving problems is more complex than simple calculations. Bunkyosha developed these books to transform the often-perceived "difficult" and "troublesome" written calculations into a learning experience that children will proactively want to solve, using the power of "unko" (poop), which children love, and "manga."

Three Features of Unko Drill Learning Manga

1. **Fun to read with "Unko"!** Unko-sensei, who conveys learning to children in an amusing way, teaches written multiplication and division using "unko." Children can read through with interest and enjoyment.

2. **Learn by reading repeatedly because it's a learning manga!** The story unfolds in a story manga format, introducing how to do written multiplication and division. Children can pick it up more easily in their daily lives than school textbooks, and by reading it enthusiastically multiple times, they can naturally understand the methods.

3. **Learn effortlessly because it's what's taught in school!** The learning scope covers all written multiplication and division taught in 3rd and 4th grade elementary school math textbooks. Children can learn without difficulty, and it can help supplement what they didn't understand in school lessons or overcome their weaknesses.