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
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Sourceslegal and public references
Mocksexam-format practice
Focusstudy records per course
CHOOSE YOUR EXAM
Focus on the exam you are taking.
Explore exam-specific guides and free questions, then continue in the Keyholder app.
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
750 original questions11 subjects and 150 single-answer questions
Assistant Nurse (Junkan)
Read the conditions and check the reason behind every choice.
- 750 original questions across 11 subjects
- Five 150-question practice booklets
- Three nutrition questions to try here
400 original subquestionsTheory, power, machinery and regulations
Class-3 Chief Electrical Engineer (Denken 3)
Read the circuit and conditions, then check every choice.
- 400 original subquestions, including both optional groups
- Five 100-point booklets per subject
- Three questions with diagrams to try here
292 questions50 questions in 120 minutes; 60 points to pass
Class-2 Electrician (written exam)
General questions and wiring diagrams, with an explanation for every choice.
- 292 original questions
- 113 wiring diagrams with figures
- Explanations for every choice
1,072 questions180 five-choice questions in 7 subjects; 40% per subject and 65% overall to pass
Building Environmental Sanitation Manager
All seven subjects, with an explanation for every choice.
- 1,072 original questions
- Five choices, every choice explained
- 180-question mock exam
1,119 questions125 five-choice questions across 11 subject groups
Certified Care Worker (written national exam)
Try three questions on dignity and independence.
- 125-question mock across 11 subject groups
- Original and attributed official questions
- Three original questions to try here
1,248 questionsGeneral and practical written questions
Physical Therapist (written national exam)
Try three questions on anatomy and assessment.
- Basic sciences and physical therapy
- Every choice explained
- Official exam criteria and dates
1,251 questionsGeneral and practical written questions
Occupational Therapist (written national exam)
Try three questions on anatomy and occupational assessment.
- Basic sciences and occupational therapy
- Every choice explained
- Official exam criteria and dates
163 + 169 questionsCargo and passenger, 30 questions in 90 minutes
Operations Manager (cargo and passenger)
Statutes and working-hour standards, with every choice explained.
- 163 cargo and 169 passenger questions
- 30-question, 90-minute mocks
- Every choice explained with its source
415 + 259 questionsFirst-stage exams for Grades 1 and 2
Civil Engineering Construction Manager (Grades 1 and 2, first stage)
From basic knowledge to construction management, by grade.
- 415 + 259 questions
- Mocks sized to the real answer count
- Every choice explained
359 + 226 questionsFirst-stage exams for Grades 1 and 2
Building Construction Manager (Grades 1 and 2, first stage)
Architecture, construction and regulations, with every choice explained.
- 359 + 226 questions
- Mocks sized to the real answer count
- Every choice explained
1,190 questionsPublished questions from the 111th to 115th exams
National Nursing Exam (Registered Nurse)
Check the reason behind every choice.
- 1,190 published questions (111th-115th)
- 50-question essential-section mocks
- Our own explanation for every choice
5 courses, 895 questionsLearn by entering journal entries
Bookkeeping (Elementary, Grades 3, 2 and 1) and Elementary Cost Accounting
Choose the accounts and type the amounts.
- Five courses, 895 questions
- Enter accounts and amounts
- Study records per grade
346 questionsGeneral questions and high-voltage wiring diagrams
Class-1 Electrician (written exam)
Calculations, materials and regulations, with every choice explained.
- 346 original questions
- Wiring diagrams with figures
- 50-question, 140-minute mocks
312 + 274 questionsIndoor hydrants, sprinklers and more
Fire Equipment Officer Class 1 (A and B)
Regulations, basics and equipment, with every choice explained.
- 312 + 274 questions
- Written mock exams
- Practical part as figure-based practice
308 + 274 questionsFoam fire-extinguishing systems
Fire Equipment Officer Class 2 (A and B)
Regulations, basics and equipment, with every choice explained.
- 308 + 274 questions
- Written mock exams
- Practical part as figure-based practice
321 + 285 questionsInert-gas, halogenated and powder systems
Fire Equipment Officer Class 3 (A and B)
Regulations, basics and equipment, with every choice explained.
- 321 + 285 questions
- Written mock exams
- Practical part as figure-based practice
292 + 257 questionsEscape ladders, rescue chutes and descenders
Fire Equipment Officer Class 5 (A and B)
Regulations, basics and equipment, with every choice explained.
- 292 + 257 questions
- Written mock exams
- Practical part as figure-based practice
217 questionsWritten exam for cranes and derricks
Crane and Derrick Operator (unrestricted)
Scored by subject weights, subject by subject.
- 217 five-choice questions
- Derrick questions added
- Weighted mock exams
200 questions per classRegulations and safety management
High-Pressure Gas Sales Supervisor (Class 1 and 2)
Statutes, properties and calculations, with every choice explained.
- 200 questions per class
- Five two-subject practice sets
- Every choice explained
250 questionsFour fields from the Unit Ownership Act to building services
Condominium Manager (Mankan)
Statutes and management practice, with every choice explained.
- 250 original questions
- Five 50-question practice sets
- Practice for the 5-question exemption
445 + 310 questionsFirst-stage exams for Grades 1 and 2
Electrical Construction Manager (Grades 1 and 2, first stage)
Electrical engineering, management and regulations, with every choice explained.
- 445 + 310 questions
- Choose-and-answer mock exams
- Every choice explained
3 courses, 698 questionsSix written fields and the asset-planning practical
Financial Planner Grade 2 (written and practical) and Grade 1 (basic written)
Calculations and rules, with every choice explained.
- 324 + 50 Grade 2 questions
- 324 Grade 1 basic questions
- One purchase for Grades 3 to 1
301 + 304 questionsLight, colour schemes and colour psychology
Color Coordinator Test Grades 2 and 1 (first stage)
JIS standards and colour theory, with every choice explained.
- 301 + 304 questions
- 60-question mock exams
- One purchase for Grades 3 to 1
230 + 213 questionsRegulations, safety management and theory
Refrigeration Machinery Officer (Class 1 and 2)
Statutes and refrigeration-cycle calculations, with every choice explained.
- 230 + 213 questions
- Written theory practice for Class 1
- One purchase for Classes 3 to 1
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.