Ogasawara Tadazane

Ogasawara Tadazane (小笠原 忠真?, March 26, 1596 – December 3, 1667) Japanese daimyō of the early Edo Period, the son of Ogasawara Hidemasa (1569–1615).

Following the deaths of his father and elder brother in the Osaka Summer Campaign, his holdings were transferred from Akashi Domain (100,000 koku) in Harima Province to the Kokura domain (150,000 koku) Buzen Province.

Famed as the lord who employed Miyamoto Musashi's adopted son Iori, Tadazane took part in the Shogunate's campaign to quell the Shimabara Rebellion, where the Kokura forces assisted in the execution of survivors of the rebel force, predominantly Christians.

Tadazane's son Tadataka succeeded him. Other children included Nagayasu, Naganobu, Sanekata, and three daughters (one of them adopted from the Hachisuka clan of Tokushima-han).

During the Edo period, the Ogasawara were identified as one of the fudai or insider daimyō clans which were hereditary vassels or allies of the Tokdugawa, in contrast with the tozama or outsider clans.