This is the Seibu-en Golf Course.
Golf is all the rage here in Japan these days. I don't play golf because if I can't hit a tennis ball with a racket that big, I doubt I'm going to be able to swing a thin club and hit a teeny tiny white ball. On top of that, I'm liable to end up hitting someone at some point during the swing and I'm not looking to get sued.
So I stay away from golf. But I do love the golf course with the nicely trimmed grass...we rarely see this much grass in the same place around here.