Seong-Ho Jang is a South Korean voice actor and animation staff member known for his work in the Korean-language dubs of various anime series. Information about his personal life and career background is not publicly documented in available sources.

His most recognized role is providing the Korean voice for the character Hisoka in both the 1999 television series and the original video animation of Hunter X Hunter. Beyond this, his voice acting credits include roles in the Korean versions of several other popular anime. He voiced Akito Sohma and Tohru's Grandfather in Fruits Basket, Kyosuke Takakura in NANA, and Masahiko Kida in Death Note.

In addition to his voice acting, Seong-Ho Jang has also worked in animation production. He is credited as an animation director for episodes of the series Kamichama Karin and Venus Versus Virus, and as a key animator for the original animation video Maison Plaisir. Due to the limited nature of available records, a comprehensive list of his roles and potential recurring collaborations with specific directors or studios cannot be compiled.