Japan Auto Insurance Calculator
Calculate your Japan car insurance premium — compulsory Jibaiseki (JCL) plus voluntary Nin'i Hoken. Includes 20-grade no-claim bonus (tōkyū) and driver-age loading.
Vehicle & Driver
Annual Auto Insurance Cost
Total First Year
¥109,094
No-claim discount: 51%
Jibaiseki (2-yr)
¥17,650
Jibaiseki Annualised
¥8,825
Voluntary Annual
¥100,269
Tōkyū Grade
15 / 20
Tōkyū Grade Impact
Grade 15 — you receive approximately 51% off rack rate. Each claim-free renewal advances you one grade. One at-fault claim typically drops you 3 grades and adds the "jiko-ari" accident coefficient for 3 years — a 10-year cost hit for a single claim.
Jibaiseki (Compulsory CALI)
Jibaiseki (自賠責 / Compulsory Auto Liability Insurance, CALI): statutorily required for all Japanese vehicles and paid at shaken (vehicle inspection) every 2 years. 2026 rate ¥17,650 for this vehicle class. Covers BODILY INJURY to third parties ONLY, capped at ¥30M per death, ¥40M per severe permanent disability, ¥1.2M per injury. Does NOT cover property damage, your own injury, or your own vehicle — which is why every serious driver also buys nin'i hoken.
Nin'i Hoken (Voluntary)
Nin'i hoken (任意保険 / voluntary auto insurance): privately sold by Tokio Marine, Sompo Japan, MS&AD Aioi, Sony Sonpo, Saison Automobile, SBI Sonpo, Rakuten Sonpo etc. Typical coverages: taijin baishō (unlimited bodily-injury liability, ¥0/standard), taibutsu baishō (unlimited property liability), jinshin shōgai (own-body injury ¥30M-unlimited), sharyō hoken (own-vehicle damage, the largest premium driver). Direct online insurers (Sony Sonpo, SBI, Saison) typically 20-30% cheaper than traditional agent channels for equivalent cover.
Two layers: Jibaiseki (compulsory) + Nin'i hoken (voluntary)
Japanese auto insurance comes in two layers. Jibaiseki (自賠責 / CALI) is the compulsory policy paid every 2 years at shaken (vehicle inspection) — roughly ¥17,540-¥21,550 for 24 months depending on vehicle class. It covers third-party BODILY INJURY only, capped at ¥30M per death and ¥40M for severe permanent disability. It does NOT cover property damage, your own injury, or your own vehicle — which is why no serious driver relies on jibaiseki alone.
Nin'i hoken (voluntary) and the tōkyū grading
Voluntary nin'i hoken sits on top of jibaiseki and covers the real financial risk: unlimited bodily-injury and property liability, your own medical costs, and your own vehicle (sharyō hoken). Pricing is driven by the no-claim grade (tōkyū / 等級) — a 20-grade ladder where new drivers start at grade 6 (~19% discount) and climb one grade per clean year, reaching grade 20 (63% discount) after 14+ years of no claims.
Accidents and the jiko-ari keisū (accident coefficient)
An at-fault claim drops you 3 grades at the next renewal AND applies the "jiko-ari keisū" — a 3-year penalty coefficient that further surcharges your premium. In practice, a single serious claim can erase the savings of a decade of careful driving. This is why many Japanese drivers self-pay small claims (under ~¥100,000) rather than losing their tōkyū standing.
Direct vs agent-sold carriers
Traditional agents (Tokio Marine Nichido, Sompo Japan, MS&AD Aioi) still dominate Japanese auto insurance but direct online insurers — Sony Sonpo, SBI Sonpo, Saison Automobile, Rakuten Sonpo — typically quote 20-30% less for identical cover. Most drivers with a clean tōkyū history and no interest in an agent's hand-holding will save meaningfully by going direct.
Common questions about Auto Insurance
Jibaiseki vs Nin'i Hoken — what's the difference?+
Jibaiseki (自賠責保険, Compulsory Automobile Liability Insurance) is the statutory minimum required to operate any motor vehicle in Japan — bodily injury to third parties ONLY, capped at ¥30M per death / ¥40M severe disability. Paid at shaken (vehicle inspection), 2-year premium ~¥12,000-¥20,000 for a passenger car. Nin'i Hoken (任意保険, voluntary) covers the gap: property damage, own-vehicle damage, own medical, bodily injury exceeding Jibaiseki caps. ~90% of Japanese drivers hold voluntary cover — driving with Jibaiseki alone is a massive liability risk.
What should Nin'i Hoken include at minimum?+
Baishō sekinin hoken (liability) with unlimited (mukaishō) bodily injury AND property damage coverage — the cap on Jibaiseki is nowhere near modern Japanese personal-injury settlements (a serious 30-year-old injury can exceed ¥200M lifetime care). Own-vehicle cover (sharyō hoken) is optional based on vehicle value. Driver medical (jinshinshōgai hoken) is worth including for co-passengers. Overseas GI coverage if you cross into Korea (via ferry) or travel with vehicle.
What is tōkyū (等級) and how does it affect premium?+
Tōkyū is the no-claim bonus grade, 1-20. New drivers start at grade 6; a claim-free year promotes one grade up to 20. At grade 20, the discount is ~63% off base premium. An at-fault claim drops 3 grades and brings a 3-year accident coefficient (~20% loading each year). A careful driver reaches the top discount band by year 14 and holds it for life.
How do driver age categories affect premium?+
Age-limited tariffs (named age or "age 21+", "age 26+", "age 35+", "all ages") directly discount premium — the higher the floor, the cheaper the policy. Under-21 drivers face ~70-100% loading. Families can list specific drivers with a "nenrei-hanishiteiritsushi" clause ensuring young drivers are correctly rated. Drivers over 70 see mild loadings return (~10-20%) due to rising incident rates.
2026 Nin'i Hoken premium benchmarks?+
35-year-old, 10 years licence, grade 20 (top no-claim), Toyota Prius, Tokyo, standard comprehensive + unlimited liability: ~¥60,000-¥85,000/yr. New driver (grade 6) same car: ~¥180,000-¥240,000/yr. Shaken every 2 years adds ~¥15,000-¥45,000 on top depending on vehicle weight and emissions class. Online direct insurers (Sony Sonpo, SBI Sonpo, Saison Sonpo, Rakuten Sonpo) typically undercut agency channels by 20-35%.
Does Japanese motor insurance cover me in Korea or Taiwan?+
No — standard Japanese Nin'i Hoken is territorial. Ferry trips to Korea require buying temporary GCC-equivalent cover at the port. Long-term overseas use needs a specific international policy. Rental vehicles abroad should be insured through the rental company plus a credit-card supplement or travel-insurance CDW.
Does my home insurance cover personal-effects theft from my car?+
Generally no — Nin'i Hoken's "own vehicle" (sharyō hoken) covers vehicle damage and contents fitted to the vehicle (stereo, dashcam). Personal effects (laptop, camera, bags) stolen from the car are typically covered under home contents insurance or a specific personal effects rider. Check both policies to avoid gaps; high-value electronics often need schedule endorsement.