1) Pole weapon of Japan 
A brow blade was a pole weapon used in feudal Japan. The bisentō has various descriptions, `a double-edged long sword with a thick truncated blade`, `a spear-like weapon with a blade at the end that resembles a scimitar`, `a polearm resembling a glaive, with a long, heavy half and a heavy, curved blade`. The bisentō is said to have been us...