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
- 21- and 44-question mocks
EXAM PREP, BUILT FOR FOCUS
Start exam prep
with three questions.
19 dedicated apps for 24 Japanese qualification exams: Health and Safety Officer (Class 1, Class 2), Registered OTC Drug Seller, Hazardous Materials (Kou, Otsu, Hei), Boiler Engineer (Class 1, Class 2), Crane and Derrick Operator, X-ray Work Supervisor, Diver, Poisonous Substances Handler, Class-3 Refrigeration Machinery Officer, Condominium Management Officer, Takken, FP Level 3, IT Passport, G Test, Fire Equipment Officer (B-6, A-4, B-4, B-7), Licensed Cook and Color Coordinator Test Grade 3. Each is built around sourced explanations and exam-format mock tests.
Choose your exam ↓19focused 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
100 questionsTwenty of the fifty questions are the Business Act
Real Estate Transaction Agent (Takken)
Start from the heaviest subject, and learn it from the statute.
- 100 foundational questions
- 50- and 45-question mocks
- Statutes on 90 questions
80 questionsSix domains, ten questions each — nothing to drop
FP Level-3 (Financial Planning Technician)
Read why the other choices are wrong, not just the answer.
- 60 published written + 20 original practical
- 60- and 30-question mocks
- Progress across six domains
100 questionsEvery one of the three domains has a floor
IT Passport
The smaller the domain, the less you can drop.
- 100 published questions
- 100- and 50-question mocks
- Explanations for every choice
109 questionsAbout 160 questions in 100 minutes, no published pass mark
G Test (JDLA Deep Learning for GENERAL)
Read why the other choices are wrong, not just the answer.
- 109 original questions
- 80- and 40-question mocks
- Explanations and sources for every choice
125 questionsThirty written questions: 40% per subject and 60% overall
Fire Equipment Officer, Class B-6 (Extinguishers)
Learn the extinguisher standards from the statute text.
- 125 original questions
- 30- and 15-question mocks
- Statutes and sources shown
140 questionsForty-five written questions: 40% per subject and 60% overall
Fire Equipment Officer, Class A-4 (Automatic Fire Alarms)
Learn the fire-alarm standards from the statute text.
- 140 original questions
- 45- and 23-question mocks
- Statutes and sources shown
132 questionsThirty written questions: 40% per subject and 60% overall
Fire Equipment Officer, Class B-4 (Automatic Fire Alarms)
Learn fire-alarm inspection and the law from the statute text.
- 132 original questions
- 30- and 15-question mocks
- Statutes and sources shown
110 questionsThirty written questions: 40% per subject and 60% overall
Fire Equipment Officer, Class B-7 (Earth Leakage Fire Alarms)
Learn the earth-leakage alarm standards from the statute text.
- 110 original questions
- 30- and 15-question mocks
- Statutes and sources shown
155 questionsSixty questions in six subjects, eighteen on cooking theory
Licensed Cook (Chōrishi)
Work through all six subjects from the statutes and official guidance.
- 155 original questions
- 60- and 30-question mocks
- Explanations and sources for every choice
170 questionsA pass line around 140 of 200 points
Color Coordinator Test, Grade 3 (Shikisai Kentei)
Only questions whose answer is decided by words, not colour swatches.
- 170 original questions
- 60- and 30-question mocks
- Explanations for every choice
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.