Mori Nagayoshi (森 長可, 1558 – May 18, 1584) was an officer under the Oda clan following Japan's 16th-century Sengoku period, and the older brother of the famous Mori Ranmaru.
Nagayoshi was known to have such a bad temper and to be particularly ruthless in battle that he came to be known as the "Devil." Nagayoshi's efforts for Toyotomi Hideyoshi during the difficult Battle of Komaki and Nagakute ultimately took his life.