Onna-Bugeishi is also known as a female japanese warrior (female samurai). The preferred weapon of an onna-bugeisha is the naginata, it was an excellent weapon, the weapon looked like a yuri (japanese spear) and a katana (japanese sword) combined. The naginata is known for it's agility and long reach, which keeps enemies at bay. Although ranged weapons such as a bow and arrow, were also used by many onna-bugeishas, the naginata was the preferred one.

Here is a picture of a famous onna-bugeisha.
(Historically drawn)
Click to load jpeg image (size - 5 kb)
(More newer, and colored version. Close representation of the warrior)
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQei-N1jNDjD2j6IBdbg8v9AnEOzgYP-LqPUrjIFZ2-PRKmaQgXPg