This is an exam preparation app for those aiming to quickly pass the "Class 4 Hazardous Materials Handler (Otsu 4)" exam.
Based on analysis of past exam questions, this app features 600 questions with detailed explanations, covering the key points needed to pass the Otsu 4 Hazardous Materials Handler exam.

Features
- One-time purchase, no ads: Focus on your studies. No subscription required.
- Offline support: Study anytime, anywhere without internet access (perfect for commuting or traveling).
- Visualized correct answer rate: Automatically track correct answer rates for each question. Identify weak areas and improve study efficiency.
- 600 past exam analysis questions: Carefully selected key points with explanations deepen understanding.
- Fill-in-the-blank question-and-answer format: Quickly solidify your knowledge. Easy to follow, even for those who struggle with memorization.

This app covers all questions on "Laws and Regulations Concerning Hazardous Materials," "Basic Physics and Chemistry," and "Properties of Hazardous Materials and Related Fire Prevention and Extinguishing Methods."

Studying this knowledge in a fill-in-the-blank format promotes memory retention. This course is especially recommended for beginners and those who struggle with memorization.

◆Covered Subjects (Hazardous Materials Handler Level 4)
・Laws and Regulations Concerning Hazardous Materials
・Basic Physics and Chemistry
・Properties of Hazardous Materials and Fire Prevention and Extinguishing Methods

Comprehensive coverage of the exam. Questions aligned with exam trends allow for efficient study.

◆Study Format
・Fill-in-the-blank Q&A: Rapidly solidify knowledge. Designed for ease of use, even for those who struggle with memorization.
・Spare Time Study: A tempo-focused UI that's perfect for commuting or waiting.

◆Feature List
・Revenge Mode: Presents only the questions you got wrong in order of your weaknesses, allowing you to pinpoint and address them.
・Time Attack: Practice like you're taking the exam with a time limit → Perfect for the final preparation period.
・Bookmarks: Organize important questions into your own personalized list of last-minute preparation.
・Notes Function: Save notes in your own words → Improve review efficiency.

◆Recommended for
・Those who want to study intensively offline without ads
・Beginners taking the Hazardous Materials Handler Exam Class 4
・Those who previously failed and want to retake the exam
・Those who want to pass efficiently using their smartphone

◆About Hazardous Materials Handlers
There are three types of Hazardous Materials Handler licenses: Class A, Class B, and Class C. Class A and Class B licenses allow handling and supervision of handling, while Class C licenses allow handling of designated hazardous materials only, including Class B Class 4 hazardous materials.

Get the fastest route to passing the Hazardous Materials Handler Exam Class 4 with just one smartphone!