Jan 9, 2010
live in the USA
As far as I know, Hikashu played in the USA twice, in 2005 and 2007. Both times they visited New York City for recording, and in spare time, they played at the Stone in 2005 and a now-defunct venue called Tonic in 2007.
There are some photos of the events, 2005 and 2007.
As for seeing them live in the USA, I would say there are possibilities, although, I'm sorry to say, not in foreseeable future. It's likely that they decided the recording for new album would be conducted in Tokyo and Shizuoka.
Regarding live performance in foreign countries other than the US, Hikashu did some concerts in Germany, in early 1990s.
The Stone official site