Iwanai is a small trading harbour that appears in The Emperor of Nihon-Ja, in the country of Nihon Jan. When the Senshi lord Arisaka went rogue and started a rebellion to overthrow the Emperor, the city of Iwanai was occupied by Arisaka's troops, as well as many others, such as the capitol city of Ito. When Halt, Will, Alyss, Evanlyn and some Skandians came to Nihon-Jan, their ship docked at the port of Iwanai. It is where Alyss, Will, and Halt meet Atsu.