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

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

2009.05.27	Polyphonica Crimson S Character Song CD vol 1 (LASM-4010)	Song
2009.08.26	Kurayami Shinchuu Soushi Souai (KICM-3194)	Song
2009.09.30	Staple Stable (ANZX-9452)	Talk
2009.10.28	Kaerimichi (ANZX-9454)	Talk
2010.01.27	Renai Circulation (ANZX-9458)	Talk
2011.08.24	Working! CharaSong Menu 5 (SVWC-7775)	Song
2012.02.22	Seirei Hirai (ZMCZ-7717)	Song