There are at least 3 bands using the name Kaizen:

1) Brazillian progressive rock band formed in 1992.
2) French metal band formed in 1994 in Elancourt. They released two albums so far : Clear The Path (2003) and Sink (2005).
3) Russian alternative rock band formed in 2010. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.