Non veni pacem mittere, sed gladium.
Yes its sharp. BUT: It is also VERY brittle. With an edge that can be broken with almost any hard contact with anything harder than flesh or bone. The Bushi of old Japan noticed early on that good swords used in combat, tended to develop cracks and eventually break. This can be minimized with training, but even the best Nihonto can shatter if it strikes the wrong target or strikes improperly.---Ray