Gokaku: Japan Driving Test

Since 1 October 2025, the written test for converting a foreign licence (外免切替) has been 50 questions with a 90% pass bar. Gokaku is built to get you through it — and through 仮免許 and 本免許 as well. It runs entirely offline, needs no account, and shows you the rule behind every answer.

FREE, WITH NOTHING LOCKED
Every question, every mock exam, every language, from the first launch. No ads, no subscription, no starter set that runs out.

12 LANGUAGES — INCLUDING THE QUESTIONS
English, Japanese, Chinese, Vietnamese, Portuguese, Korean, Spanish, Filipino, Nepali, Indonesian, Burmese and Russian. Not just the menus: every statement, every explanation and every quoted rule is translated. Japanese terms can stay inline beside the translation, so the words you will meet on the real paper stay familiar.

935 TRUE/FALSE STATEMENTS, EVERY ONE SOURCED
Each question is a ○/× statement in the style of the real paper. Answer it and you get the passage it comes from, quoted verbatim from 交通の教則 — the National Police Agency's official rulebook, 49th revision (13 Nov 2024) — or from the law itself where a rule has changed since, plus a plain-language explanation of the trap. Tap the Japanese original to copy it.

THREE REAL EXAM FORMATS, TIMED
• 外免切替 — 50 questions, 30 minutes, pass 45/50
• 仮免許 — 50 questions, 30 minutes, pass 45/50
• 本免許 — 90 questions, 50 minutes, pass 81/90
A question palette to jump around, a countdown that keeps you honest, and a full review of every miss when you submit.

ROAD SIGNS THE WAY THE EXAM SHOWS THEM
Browse all 208 official signs in one consistent style, grouped the way Japan groups them — regulatory, auxiliary plates, warning, indication, guide — and search by name or by sign number. Flashcards turn any selection into a deck: sign shown, name hidden, tap to reveal. 144 questions put the sign on screen as an image instead of describing it in words, which is what the real test does and what most study apps skip.

STUDY THAT KNOWS WHAT YOU DON'T
• Batches of 5, 10, 25 or 50 questions, new material first
• Every miss goes into a review queue and stays until it sticks
• Save any question you want back — the manual counterpart to that queue, for the ones you got right and still didn't understand
• A readiness read-out on the home screen: where you stand for the exam you are taking, and the one thing holding it back
• Mastery is tracked per statement: right first try, or twice in a row after a miss
• Progress by topic — 13 of them — and by kind of trap: "what tricks you"
• Move your progress to another device with a single file

PRIVACY
No account, no ads, no analytics, no network calls. Nothing leaves your device, because there is nothing collected to leave with.

Unofficial study aid, not affiliated with the National Police Agency or any prefectural police. For official information see the NPA Traffic Bureau: https://www.npa.go.jp/english/bureau/traffic/index.html — and always confirm current rules with your prefectural licence centre.
Since 1 October 2025, the written test for converting a foreign licence (外免切替) has been 50 questions with a 90% pass bar. Gokaku is built to get you through it — and through 仮免許 and 本免許 as well. It runs entirely offline, needs no account, and shows you the rule behind every answer.