Tomokazu appears (sings/talks) in the following CD singles.

2007 02.21	Character Song vol. 9 Kyon (LACM-4356)	Song
2009 04.22	Imamade no Arasuji (LACM-4610)	Song
2009 06.24	Kono Sumochi kara no Sotsugyou (LCM-4624)	Guest
2009 12.09	New Character Song Vol.5 Kyon (LACM-4660)	Song