Not in English no. I thought Turnbull would at least have a paragraph but he only had a sentence. No one else would have anything.

Kakunodate was the Tozawa Clan's home base during the Sengoku. They started out as a vassal of the Nanbu clan, who ruled northern Honshu. As the Nanbu's powers declined, the Tozawa became sandwiched between to the Onodera of Shimotsuke to their south and the Andō/Akita to their north, but miraculously survived. In the mid-Sengoku under Tozawa Michimori they were able to expand their westward halfway up the Omono river valley. Moriyasu took over in 1578 rather than his elder brother, and declared independence from the Nanbu while expanding southward to control the entire Yokote basin. He was one of the first (or the first) of the Northern daimyōs to submit to Hideyoshi, but problems following his death saw the Tozawa clan's realm decreased to their original area around Kakunodate, valued at 44k koku. Moriyasu's young son Masamori took over in 1592. He married the daughter of Torii Mototada and sided with the Tokugawa at Sekigahara, but decided to do his own thing instead of helping out and so was not rewarded (an incredibly common narrative in the aftermath of Sekigahara). Instead they were asked to move to Matsuoka (modern Takahagishi). In the Osaka Campaigns of 1614 and 1615 the Tozawa garrisoned Odawara and Edo. Due to their ties with the Torii family, they were moved to Shinjō (in Yamagata Prefecture) and given a 60k koku realm, where they remained through the Edo period.