Takashi Nagasako is a veteran Japanese voice actor and narrator born on February 24, 1964, in Wakayama Prefecture. He is affiliated with the talent management firm ARTSVISION. He began his career in the early 1990s, with his first anime role in 1995's Juuni Senshi Bakuretsu Eto Ranger, and has since built a substantial body of work across animation, video games, and tokusatsu television dramas. Nagasako is known for his deep, powerful voice, which he has lent to a wide array of large, powerful, or authoritative characters, ranging from kings and deities to villains and gentle giants.

In anime, Nagasako is perhaps best recognized for his role as the jovial and large-hearted Enma Daiō (King Yama) in the comedy series Hōzuki no Reitetsu (Hozuki's Coolheadedness), a part he has played consistently since 2014. His filmography also includes prominent roles in long-running franchises such as Diamond Jozu in One Piece, Hachigen Ushōda and Jidanbō Ikkanzaka in Bleach, Dodoria in Dragon Ball Z Kai, and Yashiro Uchiha in the Naruto series. He has demonstrated his range in comedic roles as well, such as the teacher Tominaga in Nichijou (My Ordinary Life) and various characters in Excel Saga. In addition to the roles mentioned, his anime credits include Sanda in Popolocrois Monogatari, Mayor Len and Professor Curio in Kirby: Right Back At Ya!, Buran in Yamibo - Darkness, the Hat, and the Travelers of the Books, Nosonman in Kinnikuman Nisei - Ultimate Muscle, Dino Mammoth in Dinozaurs: The Series, Nady Oroucandy in Flag, Zagashira in Intrigue in the Bakumatsu - Irohanihoheto, Pakaracchi and Rouran in Juuni Senshi Bakuretsu Eto Ranger, Burnbarrel in Space Symphony Maetel, the narrator in Rinshi!! Ekoda-chan, and King Kong in Guitar o Motta Shōnen - Kikaider vs. Inazuman. He has also been credited with the role of Shingen Takeda in Tono to Issho and Nor Barcoff (a variant of the character name) in Armored Trooper Votoms: Pailsen Files.

Nagasako's voice is equally iconic in the world of video games, where he has enjoyed long-running collaborations with major companies like Nintendo and Sega. He is the definitive voice of the character Donkey Kong in the Donkey Kong and Super Mario series, a role he has held since 2004. He is also well-known for voicing Ganondorf in The Legend of Zelda series and Big the Cat in the Sonic the Hedgehog franchise. Other notable game roles include Cervantes de Leon in the Soulcalibur series and Darun Mister in the Street Fighter EX series.

Throughout his career, Nagasako has also been a regular presence in the Super Sentai tokusatsu series, frequently voicing various monsters and antagonists. He has also been active as a dub actor, providing the Japanese voice for characters in foreign films and series, including Patrick Star in The SpongeBob SquarePants Movie. He remains active in the industry, continuing to reprise his signature roles in new anime adaptations and video game sequels.