The Renga province (Ak4) was the southwestern Akodo province. It was bordered in the north by the Henkyou province (Ak3) and Kokoro province (Ak2), in the east with the Ken-ryu province (Ak6) and Shimizu province (Ak5), in the south with the Tonfajutsen province (Ma3), being enveloped in the west with the Foshi province (Ki4). Notable locations within the province included Rengai Mura.