Zanbatō (?), an especially large, single-edged sword dating to the Heian period of historical Japan. The name zanbatō translates to "horse-slaying sword" or "horse-chopping saber". Original examples came from Song Dynasty China and were employed by anti-cavalry infantry in the same manner.
A Chinese anti-cavalry weapon of the Song Dynasty written also as 斬馬刀 (zhǎn mǎ dāo) is of similar proportion to a Zanbatō, although it differs in form. Surviving examples include a sword that might resemble a nagamaki in construction; it had a wrapped handle 37 cm (15 in) long, like the Zanbatō. However, the blade differed, having only a slight curve in the last half, whereas the Zanbatō's curve stretches the length of the blade and handle, similar to a katana.
The fictional interpretation of the weapon consists of a large, wide blade attached to an extended, pole-like hilt. The sword, and variations of it, are used by many characters in anime and video games. These interpretations often simply depict the weapon as an oversized sword or being imbued with magical properties. However, the weapon which most closely resembles such instances is the eku, or "wooden oar".
A few notable series featuring Zanbatō include