Whenever I arrive in Japan, my first stop is to catch up with Daikichi, stock up at a conbini, and visit his father, Mikami-san, at 3UP—a legendary tuning shop in Saitama specializing in S-chassis and SR20s. Mikami-san is a true icon, having competed in D1GP and D1SL in the 2000s, driving a 180SX, S14, and…