Katana

"Look at this katana. This must've killed Hirohito due to the nuclear test in Japan. Poor guy... must've ruined his reign due to this terrible war. Now Japan's going downhill now."

--Su Ji-Hoon, The Sunset

Historically, katanas (刀) were one of the traditionally made Japanese swords (日本刀 nihontō) that were used by the samurai of ancient and feudal Japan. The katana is characterized by its distinctive appearance: a curved, single-edged blade with a circular or squared guard and long grip to accommodate two hands.

In When the Cold Breeze Blows Away, it is being used by the Japanese Self-Defense Forces of South Japan, the Japanese People's Army of North Japan (later known as the Empire of the Rising Sun), the Samurai Union, and the Schnee Sturmtruppen and the Waffen Schnee of Weiss Schnee.