maybe i they kept track of that info in japan, like clikwir mentioned carfax for here.
but unless you got connections that most people dont, you have to rely on the word of someone else who may not have ever seen the engine in a car.
my 1st h22a had a gauge cluster with it.
my second had a little sticker on teh valve cover that was in japanese...
so i can only assume those were mileages indications showing 75,000 miles and 55,000 miles.