Are Kei Trucks Legal in Montana?

Montana never built a separate box for small Japanese trucks. We read Title 61 of the Montana Code Annotated section by section and the words "mini-truck", "minitruck" and "kei" do not appear anywhere in it. There is no 660cc threshold, no weight band, no imported-vehicle category and no decal scheme. What Montana has instead is one broad definition in § 61-1-101 that a Suzuki Carry, Daihatsu Hijet, Honda Acty, Subaru Sambar or Mitsubishi Minicab satisfies without argument: a vehicle propelled by its own power and designed or used to transport property on the highways of the state. On the face of the code a kei truck is simply a motor vehicle in Montana, the same class as a Ford Ranger.

The off-highway route is closed, and deliberately so. The same section defines an off-highway vehicle as "a self-propelled vehicle designed for recreation or cross-country travel on public lands, trails, easements, lakes, rivers, or streams", then says the term "does not include: (i) vehicles designed primarily for travel on, over, or in the water; (ii) snowmobiles; or (iii) motor vehicles designed to transport persons or property on the highways unless the vehicle is used for off-road recreation on public lands." A kei truck was designed by its manufacturer for Japanese public roads, so it falls outside the off-highway vehicle class and cannot be slotted in there as a workaround. In Montana it is a road vehicle or it is nothing.

That classification brings the ordinary obligations with it. Section 61-3-301 states that "a person may not operate a motor vehicle, trailer, semitrailer, pole trailer, or travel trailer upon the public highways of Montana unless the motor vehicle, trailer, semitrailer, pole trailer, or travel trailer is properly registered and has the proper license plates conspicuously displayed", and § 61-3-201 requires a certificate of title for a motor vehicle in the state that the department has not already titled. Nothing in Title 61 caps the road class, the posted speed or the time of day for a vehicle of this size, and nothing makes road use conditional on a county or municipal ordinance. The sort of restriction that defines Ohio practice has no Montana equivalent.

The unresolved part is paperwork, and it is not a small point. Section 61-3-216(4) says an application for a certificate of title to a used motor vehicle "must be accompanied by a certificate of title that is properly assigned by the prior owner to the applicant". A truck shipped from a Japanese auction arrives with a de-registration and export certificate, not a United States certificate of title, so there is nothing to assign. The only published alternative is § 61-3-208, the affidavit-and-bond procedure, which is written around a title that existed and was lost: for a vehicle 30 years old or older, or worth $1,000 or less, the applicant establishes the loss of the certificate of title and evidences the value; for anything younger and worth more, a surety bond for the full value is required. A 25-year-old kei truck is normally under 30 and over $1,000, which puts it in the bond branch of a provision that assumes a title once existed.

So the honest summary is that Montana classifies the vehicle clearly and says nothing at all about how it gets titled. We found no Montana statute, administrative rule, Motor Vehicle Division bulletin or attorney general opinion addressing a direct Japanese import, and the Department of Justice site that hosts the Vehicle Title and Registration pages would not serve to us on the date shown, so we are not going to characterise its contents. We also could not establish whether Montana requires a federal HS-7 declaration, EPA form 3520-1 or CBP entry summary at the counter, or how a county treasurer treats a Japanese export certificate and its translation. Treat the classification as settled and the counter process as an open question you resolve before you pay, not after.

What you can do in Montana

Ring your county treasurer before you commit, because in Montana the treasurer, not a central office, takes the title and registration application. Ask three specific things: whether they will accept a Japanese export certificate with a certified translation in place of an assigned certificate of title, whether they will route you through the § 61-3-208 affidavit and surety bond, and which federal import documents they want to see. Ask for the answer by email. A treasurer who has done one before will tell you in two minutes; a treasurer who has not will need to check, and you want that check finished before a container is on the water.

If the truck will never leave your own ground, the registration question does not arise. Section 61-3-301 bites on operation "upon the public highways of Montana", so a kei truck working a ranch, a yard, an orchard block or a private industrial site is outside it. That is a genuinely useful position in a state with a lot of private acreage, and it is the one use case that needs no clearance from anybody. It is also worth saying plainly that this does not extend to the shoulder of a county road or to a short hop between two parcels on a public right-of-way.

Do not use a Montana registration you are not entitled to. Montana is marketed heavily as a place to title a vehicle through a shell company in order to avoid another state's rules and taxes, and kei trucks are pushed into that scheme more than most vehicles. If you do not live in Montana, register where you live. An out-of-state plate does not make a truck lawful on your own roads, it does nothing for an insurance claim, and it hands your home state a straightforward case against you. If your own state refuses the vehicle, the answer is to keep it off-road there, not to buy a Montana address.

How this fits the national picture

Importing a vehicle twenty-five years or older is a federal matter and is settled. Registering one for the road is decided state by state, which is why the answer changes when you cross a line on a map. Our state-by-state guide covers all fifty, including why states disagree and the AAMVA guidance most restrictions trace back to.

We are based in Goshen, New York, and New York is one of the states that will not register these for road use. We say so on our own state's page because it is true, not because it helps us. We will not tell you a kei truck is street legal in the USA.

Common questions

Are kei trucks legal in Montana?

Montana has no law aimed at kei trucks and no law banning them. Montana Code Annotated section 61-1-101 defines a motor vehicle as a vehicle propelled by its own power and designed or used to transport persons or property on the highways of the state, which a kei truck is. The open question is not whether Montana permits the vehicle on the road but whether the Motor Vehicle Division will issue a title to an import that has no United States certificate of title, and the state has published nothing on that.

Can you register a kei truck in Montana?

Section 61-3-301 requires any motor vehicle operated on Montana public highways to be registered with plates displayed, and section 61-3-201 requires a certificate of title first. We could not find a Montana source confirming how the title is issued for a direct Japanese import, so confirm the document list with your county treasurer before you buy rather than assuming it will go through.

What is a mini-truck under Montana law?

Nothing. The words mini-truck and minitruck do not appear in Title 61 of the Montana Code Annotated. Unlike Ohio or Nebraska, Montana has never created a statutory class for small imported trucks, so a kei truck is handled under the general motor vehicle definition in section 61-1-101.

Can a kei truck be registered as an off-highway vehicle in Montana?

No. Section 61-1-101 defines an off-highway vehicle as one designed for recreation or cross-country travel, and then expressly excludes motor vehicles designed to transport persons or property on the highways unless they are being used for off-road recreation on public lands. A kei truck was designed for road use in Japan, so it does not fit the off-highway vehicle class.

Does Montana restrict where a kei truck can be driven?

We found no road-class restriction, posted-speed cap or local-ordinance requirement for small trucks anywhere in Title 61. Montana has nothing comparable to the 35 mph limit Ohio applies to mini-trucks or the interstate ban Nebraska applies to minitrucks. The general equipment requirements in Title 61, chapter 9 apply to the vehicle as they would to any other.

This page describes what we could establish from the source above on the date shown. It is not legal advice, and kei registration rules have moved in both directions every year since 2021 — confirm with the Montana registering authority before you buy. Payment for an imported vehicle is by bank transfer and is not reversible.