- Death: 1579
- Son: Isshiki Yoshisada (d.1582)
- Distinction: Lord of Tango province
- Japanese: 一色 義道 (Isshiki Yoshimichi)
Yoshimichi was the son of Ishikki Yoshiyuki, and became the head of the Isshiki clan in 1558. He opposed Oda Nobunaga and suffered the invasion of his lands in 1578 by Hosokawa Fujitaka and Tadaoki. He was initially successful against Fujitaka but was defeated when Akechi Mitsuhide arrived and the Nuta clan betrayed him after his castle fell in 1579. Yoshimichi committed suicide, but his son Yoshisada continued to resist.