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Mitsui Sumitomo Insurance

Mitsui Sumitomo Super Automobile Insurance

motorcomprehensiveHigh ConfidenceNeeds review

Cover Range

N/A – N/A

Starting Premium

¥8.5K – ¥26K/yr*

Entry Age

18 – 99 years

Renewability

Annual

Key Inclusions

Vehicle damage
CALI + voluntary liability
Personal accident
Uninsured driver
24hr roadside assistance
Natural disaster cover

Special Features

MS&AD Group
Earthquake/tsunami cover option
Online discount 10%
Roadside 24hr Japan nationwide

Riders / Add-ons

Earthquake/tsunami cover
Diminishing deductible
Transportation expense

Our analysis of Mitsui Sumitomo Super Automobile Insurance

Mitsui Sumitomo Super Automobile Insurance is a motor insurance plan from Mitsui Sumitomo Insurance, available to residents of Japan. Sum insured ranges from varies, eligible ages 18 to 99, and the policy is annual. Below is our take on how it compares to other motor plans in our database — what it does well, where it lags, and the kind of policyholder it actually fits.

Annual premium starts at ¥8.5K, against a category median of ¥9K across the 5 comparable motor plans we track in this country. That places Mitsui Sumitomo Super Automobile Insurance in the lower-mid range on price, and the middle of the pack on coverage ceiling (maximum sum insured N/A versus a peer median of N/A). On the value spectrum it reads as priced near the category median.

Coverage breadth is in line with what most motor plans offer: 6 core inclusions, 4 highlighted features, and 3 optional riders. Notable features called out by Mitsui Sumitomo Insurance include MS&AD Group, Earthquake/tsunami cover option, and Online discount 10%. On the rider side, Mitsui Sumitomo Super Automobile Insurance can be extended with Earthquake/tsunami cover, Diminishing deductible, and Transportation expense — each adding to the base premium but also widening what the policy will pay out for.

Motor cover splits into two functionally different things: third-party liability (legally required, capped statutorily) and own-damage cover (optional but the part most people actually claim against). Comprehensive plans like Mitsui Sumitomo Super Automobile Insurance bundle both, with the own-damage component priced from the vehicle's Insured Declared Value, year, and city. Premiums quoted publicly are illustrative for a representative profile; expect variation of 30–50% above or below depending on your specific car, location, and claim history. When evaluating motor plans, the two clauses that matter most are the depreciation schedule (how much the insurer deducts from a parts replacement claim) and the cashless garage network — verify that workshops near where you actually drive accept Mitsui Sumitomo Insurance's authorisation.

Where Mitsui Sumitomo Super Automobile Insurance explicitly will not pay: Drunk driving and Racing. These are not unusual exclusions for a motor plan, but they are the boundary of the contract — anything outside that list is in scope, anything inside is not. Read the full exclusions list before signing; every plan we have ever audited has at least one exclusion the buyer did not realise was there.

Analysis by WBI Editorial Team · Last verified: 2026-04-13 · Confidence: high · Methodology: how we research plans

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Quick Info

InsurerMitsui Sumitomo Insurance
Categorymotor
Country🇯🇵 Japan
Confidencehigh
Last Verified2026-04-13

Important Disclaimer

*Data is sourced from publicly available information and may not reflect the latest changes. World Best Insurer does not sell insurance. Verify all details with Mitsui Sumitomo Insurance directly. Confidence: high. Last verified: 2026-04-13. Premium figures are illustrative based on Monthly JPY, 35yo, compact car, Tokyo. Indicative..