⚠️ For those who have passed Class 4 (or the first class) ⚠️ Price is per class (please let me know which class you want) Achieved passing all classes of the Class 2 Hazardous Materials License through self-study while working. (I was a complete beginner and a hardcore humanities student) There are many reference books on the market that claim "complete in one week" or "perfect with just this," but even just reading a reference book of several hundred pages takes a week. (Reading ≠ memorizing) Furthermore, memorizing the necessary items and solving problems... Frankly speaking, it's realistic that it takes at least a month. Since you have all passed Class 4 (or the first class), I believe you have enough ability to pass other classes with your own study methods. However, if you're going to study anyway, you want to pass the exam with the "minimum effort," right? I have been thinking about this point myself while studying. This time, based on my own experience, I have compiled the "ultimate reference book" specifically for "passing the exam" on a single sheet of A4 paper. There are many "cheat sheets" for Class 4, so I am selling the more minor classes: Class 1, 2, 3, 5, and 6. Each class is only one A4 sheet!! I have used many tables and diagrams to make it visually impressive (＝memorize with images). Since it's only one A4 sheet, you can memorize it in a week at most, or in 3 days if you concentrate. (Minimum memorization is absolutely necessary for passing) After memorizing this one sheet and solving the problem set, you will almost certainly pass. (You should be able to solve them smoothly, surprisingly) ※ Please note that I cannot guarantee that you will pass. ※ In the future, I plan to sell "cheat sheets" for other qualifications (Real Estate Transaction Specialist/Sanitary Manager/FP, etc.).