Seibii
2 known investors
Seibii operates an on-demand mobile car repair and maintenance service in Japan where customers book online and vetted mechanics travel to their home or workplace to perform the work. The service offers fixed upfront pricing, cashless payment, and coverage across all 47 Japanese prefectures for consumer and business customers.
Also known as Seibii Inc. · セイビー · 株式会社Seibii
Founders & leadership
Investors · 2
Company profile
researched Aug 2026Seibii (株式会社Seibii, brand name セイビー) runs an on-demand mobile vehicle maintenance and repair service in Japan. Customers select a service from an online menu, book and pay online, and a screened professional mechanic travels to the customer's home or workplace parking space to perform the work, so no workshop drop-off or waiting time is required. The service menu spans breakdown diagnosis and repair, statutory inspection (shaken) and periodic inspections, parts installation (dashcams, ETC units, car navigation and reversing cameras, TV cancellers), battery, alternator, starter motor and oil changes, tyre and wheel changes, air-conditioning cleaning, and washing/coating. Listed starting prices include ¥9,900 for a battery replacement, ¥13,200 for dashcam installation and ¥31,800 for alternator or starter motor replacement; the company states quoted prices are fixed and inclusive of labour, travel, parts disposal and tax, with no cash payment accepted (credit card, QR-code payment, and NP deferred payment/convenience-store or bank transfer instead) [0][3][4][5].
The company positions itself as reinventing the automotive aftermarket, arguing that Japan's repair sector faces a declining number of workshops and mechanics while vehicle electrification and increasing technical complexity raise the skills required. Its stated approach is to convert individualised, craft-based maintenance work into a repeatable system through rule design, software implementation and operating models, with the ambition of becoming an operating system for the maintenance industry [2].
In addition to consumer work, Seibii sells to businesses: mobile servicing of company fleets (used-car dealers, dealerships and repair shops, pharmaceutical company sales fleets, care/welfare vehicle operators, logistics and moving companies), fleet management with inspection alerts, invoice-based deferred payment subject to credit screening, volume discounts, and a "helper mechanic" (助っ人整備士) staffing service that places its mechanics at workshops facing labour shortages, available in as little as two days [5].
Business model
Seibii sells fixed-price maintenance and repair jobs booked online and delivered on site by mechanics in its network, charging per job with prices set per service menu item and vehicle type, plus an optional subscription "maintenance pack" billed monthly (with early-termination charges of up to two months' fees). Business customers can be invoiced and pay after service subject to credit screening, and the company also supplies its mechanics to third-party workshops on a placement basis [4][5].
Per-service fixed fees inclusive of labour, call-out, parts disposal and tax; monthly subscription fees for maintenance packs; corporate quotations with volume discounts and post-payment invoicing; and fees for supplying "helper mechanics" to workshops [4][5].
Traction
The website reports more than 300,000 jobs completed and an average customer rating of 4.8 as of August 2025, with 16,098 reviews shown on the site. It states more than 500 vehicle repair services are offered and that mechanics are resident in all 47 prefectures; corporate customers and partners are cited across several industries [0][5].
Latest developments
On 2026-08-04 Seibii announced a capital and business alliance with ORIX, Tokyo Century and Idemitsu Kosan. On 2026-08-05 it announced it had received an Encouragement Award in the value-creation category of the Japan DX Awards 2026 and took part in a related panel discussion. It renewed its corporate website in early August 2026, and on 2026-05-21 announced the establishment of a council to promote the use of latent (non-practising) mechanics [0][2][5].
▸Full profile — market position, technology, go-to-market, geography, history
Market position
Seibii presents itself as an alternative to dealerships and car-accessory retailers for repair, parts fitting and statutory inspection, claiming dealer-equivalent quality at lower cost through mobile service, and frames its opportunity around structural decline in the number of Japanese repair workshops and mechanics alongside rising technical demands from electrified and more sophisticated vehicles [0][2][3][5].
On-site service removing drop-off and waiting time; prices fixed before the visit with a stated no-additional-billing policy; mechanics admitted only after a selective screening process and trained on proprietary manuals; direct customer-to-mechanic communication; a damage-compensation scheme underwritten with Mitsui Sumitomo Insurance covering repair costs from breakage or work errors; and PrivacyMark certification for personal-data handling [0][3].
Technology
Seibii develops its own software, including a mechanic-facing mobile application and a headquarters management system covering mechanic administration and work-quality checks. Quality control is described as building checks into the work process itself via service- and model-specific manuals, checklists, training programmes and post-job review by headquarters staff, rather than correcting defects after the fact [0][3][5].
Go-to-market
Direct online acquisition through its website with 24-hour intake, chat and phone support staffed 9:00-18:00 by resident experienced mechanics; a corporate sales line with inquiry and document-request forms; coupons distributed through partner voluntary insurance companies and to repeat customers; a content magazine and mechanic interview series; and television and trade-press exposure, including Fuji TV's "Sun! Shine" (2025-07-09), TV Asahi's "Super J Channel" (2025-07-06 and 2024-12-21) and an interview with representative Chimura in the July issue of Monthly Seibi Senryaku (2025-06-25) [0][3][5].
Consumer car owners, particularly those short of time due to work or childcare, and business fleet operators including used-car dealers, dealerships and repair shops, pharmaceutical companies, care and welfare vehicle operators, rental car, truck, taxi and bus fleets, and logistics and moving companies. Mechanics themselves are a second constituency, recruited to work through the platform [0][3][5].
Geography
Japan-wide: mechanics are stated to be present in all 47 prefectures across Hokkaido/Tohoku, Kanto, Chubu, Kinki, Chugoku, Shikoku and Kyushu/Okinawa, though some municipalities, vehicle types and services may be outside coverage. Headquarters are in Tokyo at 3-1-17 Roppongi, Minato-ku, Dai-2 AB Building 6F [0][3][4][5].
History
The company's specified-commercial-transactions notice records an establishment date for the disclosure of 2019-05-01, with revisions in October 2021 and February 2022. Customer testimonials on the site reference use of the service from 2021. The company's representative is listed as Maki Chimura [3][4].
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Timeline · 4
launches, deals, and filingsSeibii received an Encouragement Award in the value-creation category of the Japan DX Awards 2026 and appeared on a panel discussion on DX linked to customer value.
Seibii announced the start of a capital and business alliance with ORIX, Tokyo Century and Idemitsu Kosan.
Press release announcing the establishment of the Latent Mechanic Utilization Promotion Council (潜在整備士活用推進協議会).
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
In the news
▸Research sources · 8
primary sources listed
- Seibiiseibii.co.jp · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Seibii do?
- Japanese on-demand mobile car repair and maintenance service dispatching vetted mechanics to customers' homes and offices.
- Who founded Seibii?
- Seibii was founded by Yu Sagawa.
- Who are Seibii's investors?
- Seibii's investors include Coral Capital, Globis Capital Partners.