300 questionsUnderstand occupational health from its legal basis
First-Class Health and Safety Officer
Build command of all five subjects through focused repetition.
- 300 practice questions
- Explanations and sources
- 22- and 44-question mocks
EXAM PREP, BUILT FOR FOCUS
Start exam prep
with three questions.
Fourteen dedicated apps for Japanese qualification exams, built around sourced explanations and exam-format mock tests.
Choose your exam ↓6focused apps
Sourceslegal and public references
Mocksexam-format practice
Focusone app per exam
CHOOSE YOUR EXAM
Focus on the exam you are taking.
Each app follows one exam’s scope, subjects, and question count. Every detail page includes a free three-question diagnostic in Japanese.
300 questions
180 questionsFocus on the three tested subjects
Second-Class Health and Safety Officer
Prepare to answer all 30 questions with confidence.
- 180 practice questions
- Explanations and sources
- 15- and 30-question mocks
120 questionsWork through a public past exam with sources
Registered OTC Drug Seller
Reproduce the 120-question flow on your phone.
- 120 past-exam questions
- Explanations and sources
- 60- and 120-question mocks
680 questions totalFrom Otsu-4 to all six Otsu classes
Hazardous Materials, Otsu (incl. Otsu-4)
Practice only what your selected class requires.
- Classes 1–6
- 280 questions per selected class
- Standard and exempted mocks
450 questionsOrganize all six classes together
Hazardous Materials, Kou
Learn the differences by comparing each class.
- 450 original questions
- All six classes
- 22- and 45-question mocks
250 questionsMaster gasoline, kerosene, and diesel
Hazardous Materials, Hei
Organize the permitted materials down to the key numbers.
- 250 original questions
- Focused Hei-class scope
- 12- and 25-question mocks
139 questionsFour subjects, forty questions, equal weight
Class-2 Boiler Engineer
Find the weakest subject by name.
- 139 original questions
- Per-subject pass simulation
- 20- and 40-question mocks
129 questionsSubjects carry different weights
Crane and Derrick Operator
Scored by points, not by the number correct.
- 129 original questions
- Weighted pass simulation
- 20- and 40-question mocks
111 questionsFour subjects, weighted 30/20/25/25
X-ray Work Supervisor
Never drop the three-point subject.
- 111 original questions
- Weighted pass simulation
- 20- and 40-question mocks
116 questionsFour subjects, weighted 30/25/25/20
Diver Licence
The diving-operations block weighs the most.
- 116 original questions
- Weighted pass simulation
- 20- and 40-question mocks
119 questionsFour subjects, forty questions, equal weight
Class-1 Boiler Engineer
Find the weakest subject by name.
- 119 original questions
- Per-subject pass simulation
- 20- and 40-question mocks
112 questionsFour subjects, forty questions, prefectural pass marks
Poisonous & Deleterious Substances Handler
Solve the ten law questions from the statute itself.
- 112 original questions
- Per-subject pass simulation
- 20- and 40-question mocks
112 questionsTwenty law and fifteen safety questions, 60% each
Class-3 Refrigeration Machinery Officer
Clear twelve law and nine safety questions, both.
- 112 original questions
- Per-subject pass simulation
- 17- and 35-question mocks
112 questionsFifty four-choice questions, a pass mark that moves each year
Condominium Management Officer
You can miss twelve to fourteen, no more.
- 112 original questions
- Pass-zone simulation
- 24- and 50-question mocks
HOW WE BUILD
Trust the questions before memorizing the answers.
Start from primary sources
Questions are checked against laws and public-source material.
Design for each exam
Subjects, question counts, and pass thresholds stay specific to each exam.
From repetition to mock tests
Find weak areas through repetition, then finish with exam-format mocks.
These are independent study aids, not official exam-authority apps. Exam rules and laws can change; always check the official information before taking an exam.