I always hear questions from people asking if it is possible importing a car on your own. Well, the short answer is yes. But is it easy, the short answer is no.
The thing is, you need someone in Japan first to buy a car from an auction or a car dealer or whatever, and then ship it to you. You can do that remotely, but that is a really painstaking procedure. You are required to pay the authorities in Japan heavy fees and then again, ask them to ship the vehicle to you. You are required to deposit more than PKR 100,000 as a fee and give your passport.
Also there are auction websites where you can make an account, and deposit a certain amount of money in an escrow account. You bid on car you like, and if you win the auction, the auctioneer will send you BL of that car. The auction sites has an intermediary party that will take the money from you of that car. Some auction sites provide you service where they dispatch you the vehicle. Or forward you the details of agents who provide shipping services.
Or the simplest way is to ask the importers to buy and then ship the vehicles to you in Pakistan. There are people/agents in Japan who charge you a certain fee and buy the car for you. You can select the car online through auction website and ask your agent to buy it for you. They usually charge in Yen, and the amount roughly translates to around PKR 25000.
You will select the car, they will buy it for you and then ship it to you. Then comes the step of clearing it from the port. Again, you can go through the hassle of getting it cleared from the port or just ask the agents to clear it for you. It is a very tedious procedure to get it cleared from the port yourself, and you might end up spending a lot of time there arguing with the port authorities and there is a high chance you might end up spending way more than you were expecting.
There are agents who charge you according to the car and get your vehicle cleared from the port. Their charges usually depend on the engine capacity of your vehicle. So yes, you can import a car on your own but there is a lot of hassle. You are better off asking a professional to help you import sort of a car you are looking for.