A sword of Japanese origin, also called a 'nodachi'. It looks like an extra long katana. The sword was notoriously difficult to make and wield and was mainly used for killing mounted cavalry troops.
by LorgSkyegon October 23, 2004
by Knifeinablender January 12, 2005
A japanese sword similar to a katana but a lot bigger and it's name being translated to great great sword the odachi was the biggest japanese sabre usually having more than 100 cm of blade ( or 3.2 feet)
by Elebolt December 22, 2016