Hokushin Ittō-ryū
Hokushin Ittō-ryū also has Iaijutsu ("Hokushin-ryū iai" 北辰流居合). Now only some teachers know the techniques. Some techniques are depicted in old papers in the Kumamoto prefectural library (熊本県立図書館). It is a very simple , with 4 kata for sitting (corresponding to an enemy in front or behind), 4 kata for standing (corresponding to an enemy in front or behind), and 3 kata for hiki-waza (stepping backwards).