Sakai Tadatsugu was awarded the coastal region consisting of Tagawa, Akumi and Murayama districts, which increased his kokudaka from 38,000 koku to 138,000 koku, and then to 150,000 koku. However, the lands of the Shōnai region were fertile and well-watered, and eminently suited for growing rice, which gave the Sakai clan actual revenues of more than 200,000 koku.
Sakai Tadatsugu's territory expanded significantly after receiving a coastal region including Tagawa, Akumi, and Murayama districts. This increased his kokudaka from 38,000 to 138,000 koku, then to 150,000 koku. The fertile Shōnai region was ideal for rice cultivation, generating over 200,000 koku in revenue for the Sakai clan.