As Kenjutsu developed considerably during the Edo period, most of kata (forms of Kenjutsu) were created under the assumption that the fight would be in a peaceful time between people wearing ordinary clothes, not a fight on a battlefield in which people would wear kacchu (armor).
江戸時代に大きく発展したため、戦闘で着用する甲冑は前提とされず、平時の服装での斬り合いを想定している型が多い。