Tessenjutsu

This use of the iron fan was said to have been taught to him by a mythological creature, a tengu, who had also instructed him in the art of swordsmanship.

Some became so skilled, in fact, that they were able to defend themselves against an attacker wielding a sword, and even kill an opponent with a single blow.

Like so many other Japanese arts of combat during this era, tessenjutsu reached a high level of sophistication.

For example, in the late 16th century: Apart from using it in duels against enemies armed with swords and spears, the skilled wielder could also use it to fence and fend off knives and poisoned darts thrown at him.

[citation needed] Like a sword, the tessen could be dual-wielded to parry with one hand and attack with the other.