Tokikane Iwamatsu

…They are also called the Nitta Iwamatsu clan. The founder, Tokikane, was the daughter of Ashikaga Yoshizumi and Nitta Yoshikane, and in 1224 (Jo-o 3) and 1226 (Karoku 2), he was appointed as the land steward of the Iwamatsu district of Nitta Manor in Kozuke Province, which had been passed down to him by his mother, Nitta Nun. Since then, he became a powerful branch family of the Nitta clan, and in 1268 (Bun'ei 5), he inherited the Tokugawa district and other areas from Tokugawa Yoriari, a branch family of the Serada clan, and expanded his influence. He was instrumental in Nitta Yoshisada's attack on Kamakura, and was given the position of Hida Shugo. However, during the Nanboku-cho civil war, he joined the Ashikaga clan and gained control of Nitta Manor with the downfall of the Nitta clan. …

*Some of the terminology explanations that mention "Iwamatsu Tokikane" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…新田岩松氏ともいう。開祖時兼は，足利義純と新田義兼の娘を両親とし，母の新田尼から譲られた上野国新田荘岩松郷以下の地頭職に，1224年(貞応3)，26年(嘉禄2)に補任された。以来，新田氏の有力庶家となり，68年(文永5)には庶家の一つ世良田氏系の得川頼有から得川郷などを継承して勢力を拡大した。新田義貞の鎌倉攻めには功績があり，飛驒守護職などを得た。しかし南北朝内乱期には，足利氏に属して新田氏の没落とともに新田荘の支配権を獲得した。…

※「岩松時兼」について言及している用語解説の一部を掲載しています。

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