Tomokazu Seki (born September 8, 1972) is a popular and very famous seiyuu in Japan. He formerly worked for Haikyou, now he is the head of Atomic Monkey.
- Known For: Acting
- Birthday: 1972-09-08
- Place of Birth: Tokyo Prefecture, Japan
- Also Known As: 关智一, Seki Tomokazu, Seki Mondoya, Monto Hiraku, 門戸 開, せき ともかず, 関智一