Main article: wikipedia:Masaya Onosaka |

Onosaka Masaya voices Sendou Takeshi in Hajime no Ippo.
Onosaka Masaya (小野坂昌也) is a Japanese seiyuu born October 13, 1964 in Sumiyoshi, Osaka, Japan.
In Hajime no Ippo he voiced Sendou Takeshi. He was the only anime voice actor to originate his role in the earlier Drama CD. He is well known for portraying characters from his native Osaka, like Sendou.
His surname is Onosaka. In Japan, surnames are listed before given names.
Other Notable Works
- Sailor Moon as Jadite
- Slam Dunk as Yasuda Yasuhiro, Aida Hikoichi
- Trigun as Vash the Stampede
- One Piece as Siam, Chuu, Spandam, others
- Kinnikuman Nisei as Kinniku Mantarou
- The Prince of Tennis as Momoshirou Takeshi
- Tales of series as Xellos Wilder
- Bobobo-Bo Bo-Bobo as Don Patch
- Bleach as Hirako Shinji
- Toriko as Teppei