fuchi 縁 ( ふち ) - hilt collar between the tsuka and the tsuba

fudoushin 不動心 ( ふどうしん ) - immoveable mind; calm spirit

fukikaeshi 吹返 ( ふきかえし ) - curved panels on the sides a kabuto

fukiya 吹矢 ( ふきや ) - blowgun; blowgun dart

fukuro shinai 袋竹刀 ( ふくろしない ) - training sword made of a split bamboo stick inside a leather or doeskin bag; lit. bag shinai