Basically fighting with war fans, it's also called Tessen for short.
Most Helpful Guy
Yeah I know what Tessenjutsu is, it's an ancient Japanese martial arts and it's been used since the earliest Japanese periods. There are several famed Japanese warrior and hero's who have used it in combat you can defend yourself from swords, spears, knives and even poison darts.
But the main difference is that with actual Tessenjutsu you use Fans made out of solid iron like this so this practitioner unless she was trained using the real solid iron fans used in the martial arts, she would never be able to properly do the art in combat.
Most Helpful Girl
I practice it, with iron fans, not the cloth ones.
And it's not shortened "Tessen".
The word 鉄扇 (Tessen) refers to one of the different war fans, the others being 軍扇 (Gunsen), and 軍配 [Gunbai (Gumbai), Gunpai (Gumpai) or dansen uchiwa].3