Toshihiko Seki (関俊彦, born June 11, 1962) is a popular veteran Japanese voice actor (seiyū) who was born in Tochigi. His bloodtype is A and he is a member of 81 Produce; apart from seiyū work, Seki sometimes does live action drama stage work. He is sometimes mistaken for another seiyu, Tomokazu Seki, sharing the same last name but are unrelated. Toshihiko tends to mostly voice characters who are very serious or easily agitated, e.g. Ougi Takaya in Mirage of Blaze, Sanzo in Saiyuki, Duo Maxwell in Gundam Wing, Iruka Umino in Naruto, Kaien Shiba in Bleach and Momotaros in Kamen Rider Den-O.