Walk softly and carry a loooong sword! The nodachi is an extremely long Japanese sword used by samurai to attack targets from a distance, especially enemies on horseback (usually by just cutting the legs out from under the horse).
These types of robots/mecha are commonly referred to as 'chicken walkers'. We have from left to right: AT-ST (Star Wars), Regult (Macross), Ostall (Crusher Joe), and ED-209 (Robocop).
Tags:
at st, chicken, chicken walker, ed 209, macross