- Birth: 1575
- Death: 1612
- Titles: Dainagon
- Distinction: First Buke Denso of the Tokugawa Shogunate.
Mitsutoyo was the son of Kajuji Harutoyo, and had his Genpuku in 1583. He was the first Buke Denso of the Tokugawa Shogunate, and received the rank of Dainagon in 1612. His diary still survives.