HaHaHa yeah, we went the four extra stops too!! went back too far and went to check out Nissan Red Stage... which turned out to be a dealership. They had a parts shop with nismo gear too tho.
Loved the race cars in the front of Omori Factory tho, and super clean workshop.
You can see the NISMO sign from the train (on the left as you head out).... you'll love it!
Directions above are spot on.