Driving in Japan: Road Signs, Accidents, Insurance, and What to Do After You Return Home

Which insurance coverage fits your trip?

Japan's road rules at a glance

Japan drives on the left. The driver's seat and steering wheel sit on the right. This is the single biggest source of confusion for the roughly 65% of foreign visitors who come from right-hand-traffic countries, and the single biggest predictor of a foreign-driver accident.

Speed limits are set by statute when no sign is posted: 60 km/h on general roads, 100 km/h on expressways, 30 km/h on narrow residential roads without a centre line (effective 1 September 2026). Some expressway sections reach 120 km/h — the Shin-Tōmei Gotemba to Hamamatsu-Inasa stretch and parts of the Tōhoku Expressway. Right lane is the driving lane; left lane is the passing lane. Stopping on the expressway shoulder is forbidden except in genuine emergency. [NPA – Expressway speed council (PDF)](https://www.npa.go.jp/bureau/traffic/council/saikousokudo20230726_3.pdf); [JAF – Traffic Rules in Japan](https://english.jaf.or.jp/driving-in-japan/traffic-rules)

Blood alcohol is zero in practice. The criminal threshold is 0.15 mg/L (酒気帯び / "with-alcohol"), but 0.5 mg/L (酒酔い / "drunk") was added as a numerical benchmark on 21 July 2026. Penalties reach 5 years' imprisonment and ¥1,000,000 for drunk driving, and the driver, passengers, and the bar that served the drink are all criminally liable. The only safe norm is the ハンドルキーパー (designated driver) model. [NPA – みんなで守る「飲酒運転を絶対にしない、させない」](https://www.npa.go.jp/bureau/traffic/insyu/info.html)

Seatbelts are mandatory for every passenger on every equipped seat. Children under 6 must ride in a conforming child seat. Mobile phone use is tightened: 3 demerit points for holding the phone, 6 points (immediate licence suspension on a clean record) if the act causes a hazard. [NPA – 全ての座席でシートベルトを着用しましょう](https://www.npa.go.jp/bureau/traffic/anzen/seatbelt.html); [NPA – チャイルドシート](https://www.npa.go.jp/bureau/traffic/anzen/childseat.html)

No right turn on red under any circumstance. A separate green-arrow lamp is the only legal authorisation to enter the intersection against a red light. When turning right at a green light, you must yield to oncoming traffic going straight or turning left. [JAF – Traffic Rules in Japan](https://english.jaf.or.jp/driving-in-japan/traffic-rules)

Stop at every railway crossing, even when the gate is raised. It is one of the few remaining absolute-full-stop obligations on ordinary roads. [JAF](https://english.jaf.or.jp/driving-in-japan/traffic-rules)

Road signs a foreign driver must know

Japanese road signs fall into four categories: 案内 (information, blue), 警戒 (warning, yellow diamond), 規制 (regulatory, red/blue), and 指示 (indicative, blue). [MLIT – 道路標識の基礎知識](https://www.mlit.go.jp/road/sign/sign/douro/road-sign.htm)

The most important set for new arrivals: 止まれ (STOP, red inverted triangle — the only STOP sign in Japan); 徐行 (SLOW DOWN, same shape); 進入禁止 (NO ENTRY, red disc); 駐車禁止 / 停車禁止 (NO PARKING / NO STOPPING, red disc with bar); 速度制限 (SPEED LIMIT, red circle with km/h number); 一方通行 (ONE WAY, blue rectangle with arrow); 優先道路 (PRIORITY ROAD, yellow diamond); 歩行者専用 (PEDESTRIANS ONLY, blue disc). Newer 止まれ signs in tourist areas add the English word STOP below the kanji. A full stop is mandatory, not a yield. Failing to stop is 2 demerit points.

Road markings use three legal combinations. White dashed centre line: you may cross to overtake. White solid centre line: no crossing. Yellow solid centre line: no overtaking, but obstructing vehicles (parked cars, roadworks) may still be passed. The marking closest to you is the binding one in a yellow-and-white double line. [JAF – 白色の破線と実線、黄色の実線でどう違う？](https://jaf.or.jp/common/kuruma-qa/category-accident/subcategory-rule/faq175)

The single most-ignored sign is 止まれ. The shape is what most countries reserve for "yield". NPA identifies rolling through stop signs as the single biggest factor in foreign-driver intersection collisions. A full 3-second stop is the safe practice. [NPA – Follow the Rules (PDF)](https://www.npa.go.jp/english/bureau/traffic/document/r8_followtherules_en01.pdf)

The three error patterns that drive most foreign-driver accidents

NPA's first published foreign-driver accident dataset (May 2025) recorded 7,286 accidents in 2024, up from 5,441 in 2020. The pattern has held through 2025 (7,906 accidents, 587 fatal or serious-injury) and into H1 2026 (323 fatal/serious — already ahead of last year). [NPA notification 2025-05-28](https://www.npa.go.jp/laws/notification/koutuu/kouki/kouki20250528_137.pdf); [Sankei 2026-02-26](https://www.sankei.com/article/20260226-UHGMTKIOEZOUHINBMKY6Y5HNJQ/)

Right-turn collision: 24% of foreign-driver crashes occur while turning right, vs 9% for Japanese drivers. Foreign drivers used to right-hand traffic enter the box without seeing oncoming traffic that has priority. Treat every right turn as a fresh yield. Wait for the box to clear.

止まれ rolling stop: triangle shape is read as "yield". The intersection collision follows within a second. Stop for 3 seconds minimum. Look both ways. Pull out only when the way is provably clear.

Pedal misapplication: right-hand-drive vehicle, left-hand traffic, unfamiliar pedals. The classic "gas instead of brake" into a parking bay. Take it slow for your first few drives. Use a parking lot to retrain the foot. [ITARDA via webcartop 2025-07](https://www.webcartop.jp/2025/07/1658543/)

Is your licence valid in Japan?

Three lawful paths exist for a foreign-licence holder to drive on Japanese roads. Everything else — a non-1949 IDP, an online "IDL/ITDL" booklet, an expired home licence, a credit-card-sized IDP — is invalid. [NPA – 外国の運転免許をお持ちの方](https://www.npa.go.jp/policies/application/license_renewal/have_DL_issed_another_country.html)

Path 1 — 1949 Geneva IDP: for US, UK, Canada, Australia, most of Europe, and other Geneva signatories. Up to 1 year from issue, and up to 1 year from arrival in Japan — whichever is shorter.

Path 2 — Official Japanese translation: for Switzerland, Germany, France, Belgium, Monaco, Taiwan only. Up to 1 year from arrival. Prepared by JAF (¥6,000 from 1 July 2026), the embassy, or a designated body.

Path 3 — Conversion to a Japanese licence (外免切替): for anyone staying 1+ year; anyone whose home licence does not qualify for the first two paths. Requires 3-month prior residence in the issuing country and passing the conversion test (知識確認 + 技能確認). In October 2025 the NPA tightened the conversion test: knowledge-confirmation pass rate fell from 92.5% to 42.8%; skills confirmation from 30.4% to 13.1%. [Winds Gyosei 2025](https://www.windsgyosei.com/column/detail/id=788)

Always carry passport + home-country licence + IDP (or official translation) at all times. A police officer may demand all three at a traffic stop. Failure to produce them on the spot is a violation regardless of whether they are later produced at a station. [JNTO – Things to know when renting a car](https://www.japan.travel/en/plan/getting-around/cars/)

The three-month rule catches residents. If you are registered in the Basic Resident Register (中長期在留者), leaving Japan and re-entering within three months does not restart the one-year driving window. The clock keeps counting from the original arrival. [NPA Q&A](https://www.npa.go.jp/policies/application/license_renewal/QA.html)

JAF translation fees (from 1 July 2026): ¥6,000 for the temporary-driving translation (tax-exempt); ¥6,600 for the conversion translation (10% consumption tax included); ¥7,000 for a Chinese translation for use in Taiwan. The portal is geo-restricted to Japanese IP addresses, so it can only be submitted once you are in Japan. [JAF – How to apply for a translation](https://english.jaf.or.jp/driving-in-japan/drive-in-japan/about-dltas)

Compulsory insurance: 自賠責 / Jibaiseki

Every motor vehicle on a Japanese road must carry 自賠責保険 (Compulsory Automobile Liability Insurance, CALI). The legal basis is the 自動車損害賠償保障法 (Act on Securing Compensation for Automobile Accidents). The insurer may be any non-life insurer, a cooperative (共済), or — for small motorcycles — the post office. [MLIT CALI FAQ (English)](https://www.mlit.go.jp/jidosha/jibaiseki/en/faq/index.html)

Coverage limits (in force 1 April 2024 – 31 October 2026): Death — 3,000万円 (¥30 million). Permanent disability requiring constant care — 4,000万円 (¥40 million). Other permanent disability (Grade 1 to Grade 14) — 3,000万円 down to 75万円. Bodily injury (medical, lost income, solatium) — 120万円 (¥1.20 million). [GIAJ – 自賠責保険](https://www.sonpo.or.jp/insurance/jibai/index.html); [GIROJ base-rate notice](https://www.giroj.or.jp/ratemaking/cali/)

What CALI does NOT cover: property damage, your own injuries, damage to your own vehicle. A serious nursing-care case routinely generates lifetime costs of 200–300 million yen; CALI's cap is closer to one or two years of quality care than to lifetime provision. That is why 任意保険 (voluntary top-up) is effectively indispensable for any driver in Japan.

For rental cars: the rental company is the policyholder. The CALI certificate is held by the company, not the renter, and is included in the basic rental fee. The renter does not buy a separate policy, sign forms, or receive the certificate. The standard per-victim cap on the rental's 任意保険 is expressed as "unlimited, including CALI" — the voluntary policy is stacked on top. [JCA 貸渡約款 第29条](https://www.japan-csa.org/pdf/rent/agreement.pdf)

Penalties for driving without CALI: up to 1 year's imprisonment or ¥500,000 fine (criminal); 6 demerit points (administrative, immediate licence suspension); up to ¥300,000 for not carrying the certificate. The at-fault driver remains personally liable for the full amount of the victim's damages with no cap. [MLIT – もしも、自賠責保険・共済に加入していないと](https://www.mlit.go.jp/jidosha/jibaiseki/about/punish/index.html)

Voluntary insurance: 任意保険 and the rental package

Two tiers. CALI is the floor; 任意保険 (voluntary insurance) is everything above. A standard 任意保険 policy is a bundle of coverages. [Sonpo – くるまの保険について](https://soudanguide.sonpo.or.jp/car/about.html)

The main coverage types: 対人賠償 (third-party bodily injury, unlimited); 対物賠償 (third-party property damage, unlimited with 5万円 deductible); 車両保険 (own-vehicle damage, market value with 5–10万円 deductible); 人身傷害保険 (own / passenger bodily injury, 5,000万円 – 1億円); 無保険車傷害保険 (uninsured motorist); 搭乗者傷害保険 (passenger injury).

The rental basic fee (基本料金) already includes CALI + 対人 unlimited + 対物/車両 with 5–10万円 deductible. You do not need any add-on to drive legally — but the deductible is your out-of-pocket risk unless you buy CDW. [Times – English insurance & compensation](https://www.timescar-rental.com/en/support/); [Nippon – ご利用のご案内](https://www.nipponrentacar.co.jp/guide/userguide.html)

CDW (免責補償制度) waives the deductible. Despite the English name, CDW is not insurance — it is a contractual waiver of the 5–10万円 deductible on the rental's own 任意保険. Cost: typically ¥1,100–¥2,200 per 24 hours at Times, Nippon, Toyota, Budget. [Times – 補償コース](https://rental.timescar.jp/support/); [Toyota – 保険・補償制度](https://rent.toyota.co.jp/static/service/insurance/)

NOC (Non-Operation Charge / 営業補償料) is separate. This is the fee that catches renters by surprise. NOC compensates the rental company for lost business while the car is in the shop, regardless of fault. Typical published rates: ¥20,000 (drivable, returned to branch) / ¥50,000 (not drivable, or not returned to branch). CDW does not cover NOC — you need a separate NOC-waiver add-on (Times calls it 安心補償コース; Nippon calls it ECO; Toyota calls it 安心Wプラン). [Japan Car Rental Association – ご相談ページ](https://www.rentacar.or.jp/using/consultation)

Travel insurance (海外旅行保険) and credit-card CDW can substitute for the deductible cover but rarely cover NOC. Most travel policies explicitly exclude "accidents that might occur while using the rental car" from general medical coverage. Read the Japan-specific clause carefully.

Common exclusions apply to ALL insurance, CDW, and NOC waiver: driving under influence of alcohol, driving without a valid licence, falling asleep at the wheel, unauthorised driver, unauthorised extension, private settlement at the scene, failure to report to police, off-road / beach / riverbed driving, smoking in a non-smoking car. [Nippon – exclusion list](https://www.nipponrentacar.co.jp/car_price/coverageoption.html); [Times – agreement](https://www.timescar-rental.com/en/agreement/compensation.html)

What to do at the scene of an accident

Three legal obligations under the Road Traffic Act (RTA Art. 72), all criminal if breached: 負傷者救護 (rescue the injured — RTA Art. 117(2): up to 10 years' imprisonment); 危険防止 (prevent further danger); 警察への報告 (call 110 and report). [MLIT – 交通事故にあったら](https://www.mlit.go.jp/jidosha/jibaiseki/accident/correspondence/index.html); [NPA Follow the Rules (PDF)](https://www.npa.go.jp/english/bureau/traffic/document/r8_followtherules_en01.pdf)

Step-by-step: 1) Stop the car in a safe place. 2) Turn on hazard lights (ハザードランプ), set the parking brake. 3) Check yourself and passengers for injury; if anyone is hurt, call 119 first. 4) Place 発煙筒 (flares) and 三角表示板 (warning triangle) at 5–50 m behind the vehicle. 5) Prevent secondary collision — occupants exit the vehicle and stand behind a guardrail. 6) Call 110. 7) Render first aid. 8) Exchange information (name, address, contact, driver's licence front and back, insurance certificate, vehicle registration, witness contact; for the rental driver: rental agreement number and the rental company 24-hour emergency line). 9) Take photographs (vehicle positions before moving, damage to both vehicles, license plates, road surface, traffic signals, signage, weather, surrounding landmarks, witnesses). 10) Wait for police arrival. Do not leave the scene.

Refuse any private settlement (示談) at the scene. It voids all insurance. Insist on calling 110 and the rental emergency line.

JAF road service dispatches a tow truck, jump-starts a flat battery, changes a flat tyre, delivers fuel, extracts a stuck vehicle, unlocks a car. JAF follows the member, not the car — a foreign driver in a rental can use it. Phone: #8139 from a Japanese mobile (free, 24/7) or 0570-00-8139 from any phone (charged). 24 languages supported. [JAF – Call Road Service](https://english.jaf.or.jp/call-road-service/call-jaf)

交通事故証明書 (Jiko-shomeisho) is the only government-issued proof of the accident. Issued by the 自動車安全運転センター (JSDC) at a fee of ¥1,000 per copy. Methods: in person at any prefectural JSDC branch, postal application at any Yūcho Bank / post office window, or online via the JSDC portal (当事者本人 only). From overseas, use a representative under 委任状 (power of attorney). Mind the deadline: property damage 3 years / personal injury 5 years from the date of accident. [JSDC – 申請方法](https://www.jsdc.or.jp/certificate/tabid/113/Default.aspx); [JSDC – インターネット申請](https://www.shinsei.jsdc.or.jp/)

JNTO Japan Visitor Hotline 050-3816-2787 (24/7, English / Chinese / Korean) is the catch-all for foreign visitors needing advice during or after an accident. [JNTO](https://www.japan.travel/en/plan/hotline/)

Returning home: the bill, the claim, the dispute

Two to ten weeks after a small fender-bender, a debit or a credit-card charge lands with no clear breakdown. This is the standard pattern: final repair invoices take 4–8 weeks to flow back from the bodyshop to the rental company, and NOC + admin fees are added on top. The Japan Car Rental Association confirms that NOC is a business-loss compensation (営業補償) that the renter owes separately from repair and insurance deductible amounts. [日本レンタカー協会 – ご相談ページ](https://www.rentacar.or.jp/using/consultation)

If the bill looks wrong, dispute it in writing. Send a dated, itemised objection — preferably by 内容証明郵便 (content-certified mail) at any Japan Post 内容証明取扱郵便局. It costs roughly ¥1,200 for a single page and is accepted as evidence of when you made a demand. Always add 配達証明 (delivery confirmation). Demand: a complete, line-by-line breakdown separately identifying (a) repair costs, (b) NOC, (c) any administrative fees, (d) any insurance deductible; the bodyshop's original repair estimate and final invoice; the vehicle return-inspection record; a copy of the police report / incident reference number.

Escalation paths: 国民生活センター 訪日観光客消費者ホットライン 03-5449-0906, weekdays 10:00–16:00 JST, EN / ZH / KO / TH / VI / FR / JA. The hotline explicitly lists "high repair bill from a rental car" as a covered example. [国民生活センター](https://www.kokusen.go.jp/news/data/n-20210701_2.html). そんぽADRセンター (Japan Insurance ADR Center, run by 損保協会) 03-4332-5241, Mon–Fri 9:15–17:00 JST, free neutral mediation. [損保協会 – そんぽADRセンター](https://www.sonpo.or.jp/about/efforts/adr/index.html). 少額訴訟 (small claims court) — cases up to ¥600,000 are heard in a single session at the 簡易裁判所 (Summary Court). Filing against a foreign defendant requires 外国送達 (international service of process) under 民訴法 108 — typically 6 months. [裁判所 – 少額訴訟](https://www.courts.go.jp/saiban/syurui/syurui_minzi/minzi_25_02/index.html). Credit card chargeback through the card used at pickup (within the card's dispute window, commonly 60–120 days).

For injury cases, collect from the Japanese hospital before you leave: 診断書 (medical certificate), 診療明細書 (itemised medical bill), 支払い証明 (proof of payment), with English translation. Notify your travel insurer immediately. World Nomads (+1-954-334-8143 US / +353-21-237-8003 RoW): claim within 20 days for medical, within 90 days for general losses. Allianz: written notice within 30 days of return, supporting documents within 90 days of the loss date.

Statute of limitations (時効): 公訴時効 (criminal) is 3–5 years for most 道路交通法 violations; 民事時効 (civil claim period) under 民法 724条 is 3 years for property damage, 5 years for personal injury. A 内容証明 demand pauses the civil clock for 6 months.

For long-term residents who converted to a Japanese licence: 人身事故 (personal-injury accidents) are non-traffic-ticket offences — they are sent to the 検察庁 (public prosecutor's office), not handled by a 違反金 on the spot. Expect a 略式命令 (summary fine of ¥10,000–¥1,000,000) within 2–6 months of the accident, sent by 特別送達. You may request a formal 正式裁判 within 14 days. A 弁護士費用特約 (legal-expenses rider) is a no-claims-bonus ("ノーカウント") endorsement that reimburses up to ¥3,000,000 per insured per accident — most Japanese 任意保険 contracts offer it as an option.

Why this matters: the 2025 numbers

Foreign-driver accidents (1st party) in 2025: 7,906 — a 10-year high. [Sankei 2026-02-26](https://www.sankei.com/article/20260226-UHGMTKIOEZOUHINBMKY6Y5HNJQ/)

Fatal + serious-injury accidents (foreign drivers) in 2025: 587 (52 deaths, 535 serious). Foreign drivers' share of all motorcycle-and-passenger-vehicle accidents reached 3.0% — up from 1.4% in 2016, doubled in a decade. [NPA](https://www.npa.go.jp/laws/notification/koutuu/kouki/kouki20250528_137.pdf)

Foreign-rental-car accidents in 2025: 212 — above the 2019 pre-COVID total of 208. [MLIT 2026-07](https://www.mlit.go.jp/report/press/road01_hh_002116.html)

H1 2026 fatal/serious-injury accidents: 323 — already ahead of 2025 H1. [Livedoor 2026](https://news.livedoor.com/article/detail/32070379/)

Top nationalities in 2025 fatal/serious-injury crashes: China 23.2%, Korea 17.4%, Vietnam 11.1%, Brazil 9.2%, Philippines 6.3% — top 5 = 67.2%. [Sankei 2026-02-26](https://www.sankei.com/article/20260226-UHGMTKIOEZOUHINBMKY6Y5HNJQ/)

Foreign-rental accident rate / Japanese-rental rate in Hokkaido 2024: 1.83× (2.2% vs 1.2% of contracts). [Hokkaido Regional Bureau / Toyota Rent-Lease Sapporo](https://www.hkd.mlit.go.jp/ky/jg/gijyutu/jtfkjs0000002u13-att/jtfkjs0000002vch.pdf)

Right-turn accident share: foreign 24% vs Japanese 9% (2.5×). [Chosun Biz 2026-08-19](https://biz.chosun.com/en/en-international/2026/08/19/6DBIHUDXEVDIHAHMW65KTMY5OA/)

ITARDA relative accident rate (visiting foreigner / Japanese, 2013-17): 13.8 vs 2.5 (5.5×). [ITARDA / Nikkoken A-763](https://www.nikkoken.or.jp/pdf/project/2018/A-763.pdf)

The biggest concentration is in tourism self-drive prefectures. Okinawa 2024: foreign-rental accidents doubled YoY (22 → 44). Hokkaido 2024: 140,133 foreign-visitor rental contracts (record), with 80% Asian market share. Fukuoka Airport feeds Kyushu self-drive routes where the Ōita Expressway has been flagged as a hard-brake hotspot (2× the Japanese rate for foreign-rental drivers). [Okinawa Police 2024 Traffic White Paper (PDF)](https://www.police.pref.okinawa.jp/docs/2025061100023/file_contents/R7_kotsuhakusyo.pdf); [MLIT 九州地方整備局 PDF](https://www.qsr.mlit.go.jp/content/900006672.pdf)

Surprisingly, 83% of fatal/serious-injury crashes in 2025 involved drivers holding a Japanese licence (not an IDP) — many of them obtained through the gaimen-kirikae (外免切替 — foreign-licence conversion) shortcut. In 2024, 75,905 people converted a foreign licence to a Japanese one — a 10-year high, and 2.5× the 2014 figure. In response, in October 2025 the NPA tightened the conversion test. [Sankei 2025-05-13](https://www.sankei.com/article/20250513-ZBQTUMEMGBCBLPNFXZMVHXSJCA/)