War fans, or tessen, are tools that serve a number of purposes, not the least of which is a weapon. They were originally created for the purposes of sending signals to different units on the battlefield, and were specifically made from metal because paper fans were so ill suited to the unpredictability of battlefield conditions. While they continue to serve such a purpose, as well as the various purposes of the traditional paper fan, some groups have made excellent use of these metal fans as weapons as well, particularly among the Lion Clan and a group of ronin called the Tessen, who make Toshi Ranbo their home.
Source
Source Book
Trait(s)
Mastery Abilities
Rank 3 - Off-handed penalties do not apply when using a war fan.
Rank 5 - When using a war fan, the wielder's Armor TN is increased by +1.
Rank 7 - When using a war fan, the wielder's Armor TN is increased by +3.
Skill Type
Sub-Types
Weapon Skill
Emphases
None