Hiroshi appears (sings/talks) in the following miscellaneous CDs.

1997 04.09	Moonlight Lips III (KICA-7762)	Talk
1998 09.21	Neko na Kankei Drama CD vol 1 (APCM-5111)	Talk
1999 03.26	Favorite Dear Character Song Files 1 (KICA-5028)	Song
1999 04.21	Favorite Dear Northern Stories (APCM-5130)	Talk
2000 10.27	Kanon volume 2 (MACB-6002)	Talk
2005 10.26	Pani Poni Dash Character Vocal Album Gakuen Paradise (KICA-716)	Song
2006 01.25	Gun Parade Orchestra Drama CD vol 1 (LACA-5471)	Talk
2006 02.22	Gun Parade Orchestra Drama CD vol 2 (LACA-5483)	Talk
2006 02.22	Pani Poni Dash Drama CD 2 (KICA-737)	Talk
2006 07.26	Pani Poni Dash DJCD Pani Raji Dash! Vol.2 (KICA-795)	Talk
2007 11.21	Zetsubou Sensei Kayou Daizenshuu (KICA-891)	Song
2008 01.16	Zetsubou Gekijou (KICA-885)	Talk
2008 02.27	Persona3 Character Drama CD vol 1 (FCCT-0066)	Talk
2008 03.12	DJCD Sayonara Zetsubou Housou 2 (KICA-896)	Talk
2008 03.26	Zoku Zetsubou Gekiban Senshuu (KICA-899)	Song
2008 05.14	Zetsubou Daisatsukai (KICA-900)	Song
2008 05.28	Tindharia no Tane (KDSD-00234)	Talk
2009 04.08	Macross F Nyan Dra 1 (VTCL-60102)	Talk
2009 05.06	Macross F Nyan Dra 2 (VTCL-60103)	Song/Talk
2009 06.03	Macross F Nyan Dra 3 (VTCL-60104)	Talk
2009 07.08	Macross F Nyan Dra 4 (VTCL-60105)	Talk
2011 06.24	Angel Beats! SSS Radio Vol.6 (SSR-0006)	Talk