Odawara Domain was a Japanese domain of the Edo period, located primarily in western Sagami Province. It was centered on Odawara Castle in what is now the city of Odawara.

Ōkubo Tadachika, or also known as Ōkubo Nagayasu, was daimyō of Odawara Domain in Sagami Province in early Edo period, Japan. Ōkubo Tadachika was the son of Ōkubo Tadayo, a Fudai daimyō hereditary vas