Nansen Ichimonji is an uchigatana-type sword warrior standing 174 centimeters tall. Recorded as the 66th sword obtained by the Saniwa at Hanamaru Citadel, he appears in the Toku Touken Ranbu: Hanamaru ~Setsugetsuka~ film trilogy. Within the narrative, he forms a friendship with Buzen Gou, drawn by the reported comfort of his lap, and maintains friendly relations with Tsurumaru Kuninaga and all the Gou swords despite no prior established connections.

Statistical data from the source game details his progression through forms. His initial maximum survival is 36, increasing to 41 upon Toku awakening and 47 in Kiwame state. Leadership begins at 32, impulse at 29, and impact at 35, with his Kiwame form reaching 57, 54, and 53 respectively. Mobility starts at 41 and reaches 52 in Kiwame. Scouting begins at 33, increases to 38 when Toku, and reaches 43 in Kiwame. Camouflage is 36 initially, improves to 41 when Toku, and becomes 77 in Kiwame. His troops slot capacity remains 2 in all forms. The killing blow stat is consistently 37 until Kiwame, where it rises to 87. His combat range is consistently narrow.

He is featured in the ending theme song "Makuai Kanwa" for the Tsuki no Maki (Moon Story) film, performed alongside other sword warriors.