[chibibecci]

I've not got long left of my year in Japan so I'm trying to get some things done before the end of the year. Recently I heard that Japan has fireflies. I don't think my country has them so I've never seen them before. I live near Tokyo so I know it might be difficult to see them but I was wondering if anyone knows any good places in or near Tokyo to see them. Also, what time of year/day do they come out?
I live in Mitaka, so preferably somewhere around Mitaka, Kichijoji or Fuchu, but if you know anywhere in Tokyo, please let me know