That same year, Masayuki Hiizumi joined Shiina Ringo's backing band as a keyboard player for her nationwide tour.

In 2004, he joined Shiina's new band Tokyo Jihen, but eventually left the group to focus his attention back to PE'Z in the next year.

He later released a solo album entitled 5+2=11 under the moniker H Zett M. In October 2005 PE'Z performed at UK's In the City along with fellow Japanese artists DMBQ and The Rodeo Carburettor.

Their gig at SXSW was subsequently followed with their first-ever US tour as part of Japan Nite, performing in New York City, Cambridge, Philadelphia, Chicago, Denver, Seattle, Portland, San Francisco, and Los Angeles.

In 2014 they released a new original album called Chisou, but in December 2014, drummer Kou posted to the band's official webpage that the group would dissolve in the following year.