Festivals in Japan

I'm conscious of about 4 music festivals throughout Japan. But I know there must be many more that are either lost in translation via the internet or just an underground event.

Maybe it might be worth it for TGG to post up a list of festivals in Japan. I've always thought it would boost your artist's credibility to local "live house" bookers after playing a festival.

The ones I know about so far are:
Tokyo Summer Festival - www.arion-edo.org/home/
Fuji Rock - www.smash-uk.com/frf08/
Summer Sonic Festival - www.summersonic.com/
Kyoto Music Festival - www.kyotomusicfestival.com/

Any others I don't know about yet?

It's a good idea.
I'll find somewhere to add such a festival directory on the site.

Here are some I know about.
Note that a lot of them only have domestic artists.

Asagiri Jam in Shizuoka
www.smash-jpn.com/asagiri/index.html

Rock In Japan in Ibaraki
www.rijfes.co.jp

Rising Sun Rock Festival in Hokkaido
rsr.wess.co.jp

Nagisa Music Festival in Tokyo and Osaka
www.nagisamusicfestival.jp

Nano Mugen Fes in Yokohama
www.nano-mugenfes.com

Solstice Music Festival (trance/psy techno) in Yamanashi
www.solstice23.com

Sense of Wonder in Yamanashi
s-o-w.jp

Soul Mate in Tokyo
www.soulmatefes.com

Metamorphose in Shizuoka
www.metamo.info

Loud Park (metal) in Saitama
www.loudpark.com

Earth Celebration on Sado Island
www.kodo.or.jp/ec

Zao Dragon in Yamagata
zaoryugansai.com

Isla de Salsa near Fukuoka
www.isla-de-salsa.jp

Space Of Sound in Nagano
www.mother.bz

Wire in Yokohama
www.wire08.com

Countdown Japan in Osaka and Tokyo
www.rock-net.jp/fes/countdownjapan

The Greenroom Festival in Yokohama and Osaka
www.greenroom.jp

Aomori Rock Festival in Aomori
natsunomamono.fc2web.com/frame.html

Tokyo Jazz Festival in Tokyo
www.tokyo-jazz.com

Miyako Island Rock Festival in Okinawa
www.mirf.jp

Sweet Love Shower in Yamanashi
www.sweetloveshower.com

Ishigaki Music festival in Okinawa
www.ishigaki-fes.jp

Labyrinth Techno Festival in Gunma
www.mindgames.jp

does anyone know if there are any in february?

Another big one is the Loud Park Fest www.loudpark.com/09/index.html which is up coming soon. We attended one last year and that was loud, no kidding. Here is the report ( rockapertura.ucoz.ru/publ/loud_park_fest_samyj_tjazhelyj_v_japonii/2-1-0-9 ) I wrote with lots of pics and some videos. The words are in Russian but pictures are international though :)