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 Sesshōmaru 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 Tōga to hit the Black Pearl, the old man's head laughs, but when at the wrong place, the woman's head shrieks.

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

Trivia

 * The Nintōgō dates back to Japan's earliest history. It was meant to symbolize the impermanence of life. It was associated with Enma, the most important of the 10 Kings of Hell, who is sometimes shown holding this object. Enma is associated with long life and protection from illness and misfortune. Artwork of the 10 Kings includes a staff surmounted with two human heads that comprise one male and one female. This object is known as the Dandatō (檀拏幢). The two heads assist the kings during the trials of the deceased. The male head, known as, is shown with its mouth open, for he is reporting the misdeeds of the deceased. The female head, known as , is shown with its mouth closed. A person must appear before Enma and the other judges of hell when they die. They determine whether the person is good or bad. The person is then reborn into the most appropriate of the six realms.