The larger the weapon, the more powerful it becomes, which is the highest pursuit of weapons by many barbarians. The principle of focusing on energy far more than skill makes him a victorious general on the battlefield. However, in Futarasan jinja, Japan, people here worship a giant odachi with a total length of over three meters. This size of weapon is far beyond the scope of normal human use, but what is even more surprising is that this size of sword is not a case in Japan. Who are these swords made for, and what kind of arm are those who play with them.