Kousuke Okano is a Japanese voice actor formerly belonging to voice acting talent agency Production Baobab but is now freelance. He often worked for Japanese anime television network Animax as a narrator along with fellow voice actress Yukari Tamura. He uses the alias Masaru Hishi for his work on adult games and anime.
| Movie | Nintama Rantarō: Invincible Master of the Dokutake Ninja | 2024-12-20 | |
| Series | Hiiro no Kakera | Mahiro Atori (voice) | 2012-03-06 |
| Movie | Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck! | Rikichi Yamada (voice) | 2011-03-12 |
| Series | Togainu no Chi: Bloody Curs | 2010-10-07 | |
| Series | Ghost Hunt | Osamu Yasuhara (voice) | 2006-10-03 |
| Series | Kamichu! | Yashima-sama (voice) | 2005-06-29 |
| Series | Doki Doki School Hours | Takumi Watabe | 2004-04-04 |
| Series | Burst Angel | Unknown | 2004-04-06 |
| Series | Koi Kaze | Kei Odagiri (voice) | 2004-04-01 |
| Series | Bleach | Unknown | 2004-10-05 |
| Series | Samurai Gun | Masa | 2004-10-04 |
| Series | Final Approach | Haruki Mukasa (voice) | 2004-10-03 |
| Movie | Flame of Recca: Final Burning | Recca Hanabishi (voice) | 2004-06-10 |
| Series | Transformers: Armada | Hot Rod (voice) | 2003-01-10 |
| Series | The Twelve Kingdoms | Takasato (voice) | 2002-04-09 |
| Series | Crush Gear Turbo | Eddie Kobayashi (voice) | 2001-10-07 |
| Movie | Initial D: Third Stage | Kenta Nakamura (voice) | 2001-01-13 |
| Series | Saiyuki | Son Goku (voice) | 1999-04-23 |
| Series | Great Teacher Onizuka | Noboru Yoshikawa (voice) | 1999-06-30 |
| Movie | Happy Birthday: The Time When Life Shines | Naoto Fujiwara | 1999-07-27 |
| Movie | Virgin Fleet | Mau Sakisaka | 1998-04-25 |
| Series | Ayane's High Kick | Announcer (voice) | 1997-01-21 |
| Series | Flame of Recca | Hanabishi Rekka | 1997-07-19 |
| Series | Isaku | Kenta Kogure (voice) | 1997-11-28 |
| Movie | Bakumatsu no Spasibo | Kumasaburo Matsushiro (voice) | 1997-09-20 |
| Series | The Ping Pong Club | Maeno (voice) | 1995-04-06 |
| Series | Saint Tail | Daichi Asuka Jr. | 1995-10-12 |
| Movie | Captain Tsubasa Movie 05: The Most Powerful Opponent! Holland Youth | Makoto Souda (voice) | 1994-11-14 |
| Series | The Irresponsible Captain Tylor | Jason | 1993-01-25 |