Yeah, Japan is an expensive place to get to these days, but with deflation ahead, it'll be cheaper when you get here! Plus they've been falling short of the tourist numbers they want to bring in, so maybe they'll start some desperate campaigns to make things cheap and accessible.
To answer some questions: I'm a guy. I'm in Yokohama area (for the next 2-3 years at least). There used to be a picture of my wife and I on our wedding, but it didn't survive the 2nd or 3rd forumocalypse. I'm not really big on putting my picture out in public, even though this community is the one place I'd consider it.
Pachinko is one of only two 'legal' publicly available gambling methods in Japan. Horse racing is the other. Basically, you go and sit and smoke and watch little balls spin into holes to get more balls so that the slot machine whirls so that you can get more balls and then you trade in the balls for a prize and then you trade in the prize for money and then you go back and smoke and watch little balls spin into holes to get more balls so that the slot machine whilrs so that you can more balls and then you....get the idea.
The short explanation is: it's mind numbing boredom in an incredibly bright, noisy and smokey atmosphere. But, you can win money. I've played once, and that was enough.
@Jorram, we must frequent different parts of the forum since I don't know that I've ever seen you before.

But, I'm close to Tokyo, we could meet up sometime. PM me. I know one other Malazan fan in Japan, Kage-za is his forum name, who has posted maybe 10 times total.
You’ve never heard of the Silanda? … It’s the ship that made the Warren of Telas run in less than 12 parsecs.