Oda Nagamasu (織田 長益, 1547 – January 24, 1622) was a Japanese daimyō and a brother of Oda Nobunaga[1] who lived from the late Sengoku period through the early Edo period.

Also known as Yūraku (有楽) or Urakusai (有楽斎), the Tokyo neighborhood Yūrakuchō is named for him.

Nagamasu was an accomplished practitioner of the Japanese tea ceremony, which he studied under the master, Sen no Rikyū.

In 1584, he then joined Oda Nobukatsu and collaborated with Tokugawa Ieyasu against Hideyoshi at the Komaki - Nagakute campaign and battled against Takigawa Kazumasu at the Siege of Kanie Castle.

Later, he was one of the peacemakers between Tokugawa Ieyasu and Toyotomi Hideyoshi, also between Sassa Narimasa and Maeda Toshiie.