concert venues:
日本武道館 NIPPON BUDOKAN
http://www.nipponbudokan.or.jp/
where The Beatles did their first and last concert in Japan.
よみうりランド イースト YOMIURILAND EAST
http://yar-3.net/d/image/2005-02-21/R0017353.JPG
It's in an amusement park and has open-air stage.
To visit in Tokyo:
Umm... I have no idea. Do you think he likes Japanese traditional arts?
たまごっちデパート TAMA DEPA in Harajuku
http://link.channel.or.jp/tamadepa/index.php
I'm useles.....