Miki is a former editor at Dengeki Bunko and currently works as a producer at Straight Edge. He joined the editorial department of Dengeki Bunko in 2001, where he worked on Shakugan no Shana and later became editor-in-chief in 2014. During his tenure, Miki served as editor on titles such as A Certain Magical Index, Sword Art Online, and The Irregular at Magic High School. He also produced their respective anime adaptations. Kadokawa published an autobiographical book by Miki titled Omoshirokereba Nandemo Ari Hakkō Ruikei 6,000-man-bu ― Toaru Henshū no Life Work (If Its Interesting It Can Be Anything).