About this app
A study app for the Japan Class 2 Electrician (Dainishu Denki Kojishi) written exam. Study efficiently with practice questions and detailed explanations across all 7 subjects. ■ Subjects Covered - Basic Electrical Theory - Power Distribution Theory and Wiring Design - Electrical Equipment, Wiring Devices, Materials and Tools - Electrical Construction Methods - Inspection Methods for General Electrical Facilities - Wiring Diagrams - Laws on Safety of General Electrical Facilities ■ Study Modes - Random practice (10 / 25 / 50 / 100 questions) - Study by subject - All questions in order (resume supported) - Review incorrect answers - Bookmarks and unanswered questions ■ Progress Tracking - Automatic tracking of correct answer rate - Subject-by-subject performance overview Works completely offline — study anytime, anywhere. ※ This app is an independent study tool and is not affiliated with any examination body.
Latest release
What’s New
Minor fixes.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Sep 14, 2026 · 6:25 PM Free
Screenshots
