Earlier this year I visited Shoden Eigen-in near Kenninji in Kyoto. Shoden Eigen is the home of Nobunaga's younger brother, Oda Nagamasu's (1547-1621?/22) grave. He was either the 10th or 11th son of Oda Nobuhide and was born in Owari. Nagamasu participated in Nobunaga's Kyoto Cavalcade in 1581 in the Gorenshi group. Here is the interesting part. During the Honnoji Rebellion in 1582, he stayed at Nijo with his nephew Oda Nobutada, but somehow managed to escaped and fled to Gifu Castle. Nagamasu also participated in the Battle of Sekigahara 1600 as he led 450 soldiers. He on the side of the victorious Tokugawa Ieyasu. Nagamasu was also known as a tea master who studied under Rikyu and later formed his own school. It was known that he was baptized and took the name of John. One of his most famous tea houses is located in Inuyama in Aichi Prefecture. In 1618 Nagamasu restored Shoden Eigen. Soon after that, he passed away in the Higashiyama area of Kyoto. Nagamasu is only mentioned a few times in The Chronicle of Lord Nobunaga.
Also see Taniguchi Katsuhiro's Oda Nobunaga Kashin Jinmei Jiten (pp. 110-11)
Tenka no tame!