Oka han

• Location: Ôita prefecture
• Kokudaka: 70,440 koku
• Lords: Nakagawa clan
• Japanese: 岡藩 (Oka han)

Oka domain was a domain based in modern-day Ôita prefecture. Ruled by the Nakagawa clan, it was rated as having a kokudaka of 70,440 koku.

References

• Ogawa Kyôichi 小川恭一, "Shogun omemie sahô" 将軍お目見え作法, Tokyojin 東京人 (1995/1), 84.