I went here to go to the once a year foreign book sale which luckily coincided with my trip to Tokyo to take the GMAT. I had gotten a good score the day before so I was in the mood to spend money. This place is huge, so huge it has room to set up a temporary bookstore on the 14th floor or something. I bought a pile of books, the prices for Japan were cheap. You could pick up a soft cover novel for 400 or 700 yen. I ended up buying seven books or something. I spent a pile of money on books while in Japan. Next time I live abroad I'll have to give serious consideration to the cost of English language reading material.