Kouki Miyata (宮田 幸季, Miyata Kōki, born October 9, 1972) is a Japanese voice actor affiliated with 81 Produce. His former stage name was Harunori Miyata (宮田 始典, Miyata Harunori).
- Known For: Acting
- Birthday: 1972-10-09
- Place of Birth: Yokohama, Kanagawa Prefecture, Japan
- Also Known As: みやた こうき, みやた はるのり, Miyata Kouki / 宮田 幸季, Toujou Naoki / 東城 直樹, Miyata Harunori / 宮田始典, Kōki Miyata, Koki Miyata