Buying a Car in Japan: The Ultimate Guide to Shako Shomei and Inkan Shomeisho
· GaimenGo Team

Buying a standard passenger car in Japan usually requires two important documents: a Parking Space Certificate (Shako Shomei) and a registered seal certificate (Inkan Shomeisho). Here is a step-by-step guide.
Buying a Standard Car in Japan
If you are buying a standard passenger car (white plate) in Japan, the paperwork is usually stricter than buying a Kei car (yellow plate). Dealerships generally cannot complete the registration of a standard passenger car in your name without two important documents: the Shako Shomei (Parking Space Certificate) and the Inkan Shomeisho (Seal Registration Certificate).
Here is a clear breakdown of what these documents are and how to obtain them.
1. Shako Shomei (車庫証明) - The Parking Space Certificate
In Japan, you must usually prove to the local police that you have a designated off-street parking space before you can register a standard car.
Required Forms Based on Your Parking Situation:
- If you rent your parking space (Apartment/Private Lot): You need the Consent for Use of Parking Space (保管場所使用承諾証明書). You cannot fill this out yourself. You must ask your landlord or property management company to complete, sign, and stamp it. (Note: Management companies may charge an issuance fee of around ¥3,000 to ¥5,000.)
- If you own your parking space (House/Land): You will use the Self-Declaration Form (保管場所使用権原疎明書面 - 自認書), which you can complete and sign yourself.
The Application Process:
- Gather documents: Along with the Consent or Self-Declaration form, you must prepare a simple map showing your home and parking space, plus a diagram of the parking area with your spot's dimensions.
- Submit to the police: Take the completed application packet to the traffic division of the local police station that has jurisdiction over your address.
- Police review: The police will verify that the space exists, is large enough for your car, and is not already assigned to another vehicle.
- Pick up the certificate: After 3 to 7 days, return to the police station to collect your official certificate and parking sticker. The application and issuance cost is usually around ¥2,000 to ¥2,700.
Pro tip: If you are replacing a Kei car with a standard car, and your Kei car was not previously registered for that space, you may need to apply as a new vehicle rather than a replacement. Confirm this with your local police office.
2. Inkan Shomeisho (印鑑証明書) - The Seal Registration Certificate
For a standard passenger car purchase, a simple signature or unregistered stamp is usually not enough. You normally need a legally registered personal seal, known as a Jitsuin (実印).
How to Register and Get the Certificate:
- Register your seal: Take your personal seal (inkan/hanko) to your local city hall or ward office. The name on the seal should match your legal name as shown on your residence card.
- Make it a Jitsuin: Once the city registers it, it becomes your official Jitsuin.
- Request the certificate: Ask the city hall to issue an Inkan Shomeisho. This document proves that the seal used on the dealership's transfer paperwork belongs to you.
Important: Dealerships usually require the Inkan Shomeisho to be issued within the last three months, so do not prepare it too early.
Finalizing Your Purchase
Remember the simple rule:
- Shako Shomei proves where the car lives (handled at the police station).
- Inkan Shomeisho proves who you are (handled at city hall).
Once you have both documents, give them to your car dealer, sign the final contracts, and prepare to receive the keys to your new car!