FreeSpot

Japanese guide in vague English to free WiFi spots and Netcafes in Japan. Hell, I even found a 8 freespots in the town near my rice ranch in Ehime, Shikoku.

Japan: http://www.freespot.net/users/map_e.html
Tokyo: http://www.freespot.net/users/map-e/map_tokyo.html
Yokohama: http://www.freespot.net/users/map-e/map_kanagawa.html
etc...

Via the detailed post about finding nomadic access in Tokyo on the drDAVE

[quote="drDAVE"] Free HotSpots: there are a few...
Only problem with most free hotspot located in trendy bars and cafes....

Nonetheless, one really cool place to go drink a beer while accessing the net, is Good Day Cafe in Omotesando, which is equipped with an outdoor patio, a nice selection of import beers and decent food. I can already foresee a few super-casual-friday work afternoons spent there this summer...

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