List of location for free wifi in Japan :

Freespot Map (not associated with The Wi-Fi-FreeSpot Directory) helps set up locations that offer free access. Check their map for locations in Japan.

OkinawaHotspot - American Village Mihama area - Chatan-Cho - Okinawa

Dog Day Cafe - 4-46-8 Wakamatsu - +81 0 42 367 1145 - Fuchu, Tokyo

M Bar K Bar & Kitchen - 1-24-23 Kizuki, Nakahara-ku - 81 44 433-0028 - Kawasaki

Sin - Caffe/Wine Bar/Rest. - Minami Aoyama 5-7-2 B1 - 81 3 6419 3838 - Minato-ku - Tokyo

Joyoh Hotel - 2-15-3 Kiyokawa - 81 (0)3 3875 5362 - Tokyo

SASEBO Naval Base - might be limited access for military personnel only, not sure - Harbor View Club’s Puck’s Cafe and patio, the Chief Petty Officer’s Club and the second deck of the Galaxies Nightclub

*N: Please Add a comment if you known other location .