The Seoulsonic bands are not the only ones playing for charity. Via Korean rock is real I came across this Hankyoreh article: S.Koreans mobilize to support Japan. Turns out Wiretap In My Ear (aka Prana), GoGo Star and Romantic Punch will all be playing for Japanese earthquake relief on March 19.

Update March 17: Again via Korean rock is real. The Hankyoreh also reports that Kim Chang Wan Band too is playing in support of Japan: Indie bands to hold benefit concert for Japan. This show is on March 18.