These three companies dominate the market. Their high school series are the ones you will most likely find in PDF searches:
| Course Name (English) | Course Name (Japanese) | Key Topics Covered | | :--- | :--- | :--- | | | 数学 I | Equations & Inequalities, Quadratic Functions, Trigonometry (sin/cos/tan), Data Analysis | | Mathematics II | 数学 II | Polynomial functions, Exponential/Logarithmic functions, Trigonometry (addition theorem/graphs), Differential Calculus | | Mathematics III | 数学 III | Integral Calculus (advanced), Sequences, Limits, Complex Numbers (advanced) | | Mathematics A | 数学 A | Plane Geometry (proofs), Permutations & Combinations, Probability, Integer Properties | | Mathematics B | 数学 B | Vectors (plane & space), Statistical distributions, Number sequences | | Mathematics C | 数学 C | Matrices, Linear Algebra basics, Conic sections, Advanced probability | Japanese High School Math Textbook Pdf
Japanese high school mathematics is divided into numbered courses (I, II, III) and lettered electives (A, B, C) that follow the national Course of Study 日本学生支援機構（JASSO） 1. The Core Curriculum Structure These three companies dominate the market