I'm surprised to see the bad reviews. I have used Japanese Auto repair twice and have found them honest, reliable and to do good work. I guess it depends on your expectations. I have a 2000 Honda Prelude which I normally have had serviced at a Honda dealer. I bought the car new, and believe in the idea that it is worth paying for good maintenance. I'm not looking for the cheapest job, but good quality work that will keep this car running well for several more years. The model isn't made anymore.
There were a number of issues that had to be resolved including a cracked catalytic converter. Japanese auto correctly diagnosed the issues (which I was pretty certain about for a number of reasons), made the repairs, completed a full service, provided parts to my specification at reasonable prices. I felt that the total price was fair, especially in comparison with what I would pay at the dealership in San Francisco. I'm fussy about this vehicle, and I'm pleased with the service provided.
Perhaps it is all about expectations, but I have found no reason for complaint, rather a reason to recommend Japanese Auto Repair in Provo.