As I have left Japan, I cannot update the concert schedule anymore. But if you are interested in some Japanese live music, check out the band websites in the Links collection or the websites of these locations in Osaka/Kansai. Further I have listed a couple of regular live festivals in Japan.
Have fun!
LIVE VENUES:
Bears, Namba, Osaka (JP)
BigCat, Big Step Building 4F, Shinsaibashi, Osaka (big)*
Cross Road, Neyagawa, Osaka (JP) (Sunday concerts)*
Club Drop, Amemura, Shinsaibashi, Osaka (JP)*
Fandango, Juso, Osaka (E)
Galaxy House, Toyonaka, Osaka (Shijo Monorail Sta.)*
Hokage, Amerika Mura, Shinsaibashi, Osaka
King Cobra, Shinsaibashi, Osaka*
Live Square 2nd Line, Kita, Osaka (JR Fukushima Sta.)
Mersey Beat, Sannomiya, Kobe*
Muse, Kyoto*
Muse, Shinsaibashi, Osaka *
Namba Hatch, Namba, Osaka
Noon, 3-3-8 Nakazaki, Kita-ku, Osaka (JP)*
Pipe69, Shinsaibashi, Osaka
Club Quattro (E), Shinsaibashi, Osaka (live concert schedule, JP)
Sinkagura, Shinsaibashi, Osaka (small venue, Punk)*
Urban Square, Sannomiya, Kobe*
Zepp, Cosmo Square, Osaka (big)*
(I've been to the locations marked with *.)
MUSIC FESTIVALS:
Punkspring in Osaka & Tokyo (March/April)
Nijino misaki Festival in Akamizu, Kyushu (May)
Rock in Japan (July/August)
Fujirock near Fujisan (July)
Ezo Rising Sun Rock Festival in Hokkaido (Summer)