Nintōjō

The, also known as the Staff of Two Heads in the English version of the anime, was the weapon which Jaken wielded. It could produce long streams of flame, and generated large floods of water.

After Sesshōmaru saved Jaken and his imp tribe from being slaughtered Jaken decided to follow him.Sesshōmaru retrieved the Staff from a waterfall and gave it to Jaken. If he could wield it, he would be allowed to join Sesshomaru on his travels.

Physical description
It looks like the name it was given. On half of the top of the staff, sat the head of an old man, and on the other, sat the head of a once-beautiful woman with silky black hair. The staff was taller than Jaken himself.

Powers & Abilities
The Nintōjō has few abilities. The old man head can spew an impressive amount of fire upon Jaken's command. When close to the grave of the Inu no Taishō, the old man's head laughs, but when at the wrong place, the woman's head shrieks.

After the location of Inu no Taishō's grave, Jaken retains the Nintōjō, which can still spew fire from the old man's head.