I used to buy only grade 4 or 4.5 cars.
I have to say, I never got a bad one.
But I did travel up to Newcastle docks to get a Delica once to find the wheels had been changed for 4 baldies.
We guessed that had happened in the UK docks.
Clocking used to be a big problem years ago, the Bimta checks helped a bit, but going back 15 years a high percentage of imports got clocked when they arrived.
The dealer I shared a forecourt with left Southampton because if it.
Dealers used to say "nah, you never get service histories"
I've picked up maybe a 100 imports from the docks, most of them had the jap history in the glove box ..
It's changed nowadays though, with the Bimta check able to give you the mileage of the car when it went through the auction in Japan, and most cars are sold at auction over there.
I wouldn't hesitate to buy a Jap import if it was the car/spec I wanted, ive seen some really nice ones over the years.
My friend still brings the odd bongo in, they are getting harder to get now in nice condition.