It's usually not for money... actually it's never for money. I've never seen a race that involved money. Bragging rights... of course. Fun... damn yes. The races are 90% on the weekends. Friday and Saturday nights. On the weekdays, the locals usually practice at night. Since I live in Tokyo, I'm in the middle of all the passes. So I'm not a "local" to any of them, which is why I goto every pass, I don't stick to one like most people. I want to dominate everyone, at every mountain pass. That's my main goal. Only that damn silver BNCR33 has beaten me though. But I think I said it on an earlier post. Since my dad always goes with me to the passes, if he sees that BNCR33, he will race him and beat him for me. When there's a huge race going on, the galleries (dumb name, but if you watch Initial D, you know what it is) are always jammed with people that just want to watch. When there's not a big race, the galleries is just a big car show down every other hairpin. When I race somebody that's tough, my friends will tell everyone to come to the race so they can watch me. I think the coolest thing I've done on the passes, is drift on a straight, going from 4th gear, to a 2nd gear hairpin in one drift is a good accomplishment for me. I always wanted to see what I'd look like if I was watching myself race. How many people race? Well it all depends. If there's a once in a lifetime race occuring, there're usually one or two battles. My dad has raced twice... both times I didn't go (I think I was doing something to my car), and everyone told me how awesome he was, and asked why I didn't go, etc. On a normal night, where they're no pre-scheduled battles, there's about 5-6 good races. The most I've seen was I think 8 in one night. One of these days I'll hopefully ride shotgun in my dad's next battle... but I seriously doubt it. Don't worry about the barrage of questions, I came on this board to answer questions about Japanese racing. Hope this helped.
-Tom