CAVE Interactive Co., Ltd.[a] is a Japanese video game company founded in 1994 by former employees of Toaplan following its bankruptcy. They are known primarily for their "bullet hell" shoot 'em ups; from 1995 up to 2013, CAVE was one of the most prolific shoot 'em up developers in the Japanese market. Alongside this, CAVE has produced a variety of other types games for arcades, home consoles, PCs, and smartphones, also dating back to 1995.

[from Wikipedia]