Yonekura Masayoshi (米倉昌由, December 8, 1777 – February 8, 1817) was the 5th daimyō of Mutsuura Domain in southern Musashi Province, Honshū, Japan (modern-day Kanazawa-ku, Yokohama, Kanagawa prefecture) and 9th head of the Yonekura clan.
In 1798, upon Masakata’s death, he was selected as heir, and was confirmed to that position in an audience with Shōgun Tokugawa Ienari in September of the same year.
As daimyō, he was assigned to several ceremonial postings as guard of various gates to Edo Castle.
However, on June 15, 1803 he claimed illness was retired, surrendering his title and official positions to his adopted son, Yonekura Masanori.
Masayoshi had a single daughter, and died without a male heir.