A yari (spear) crafted by Fujiwara Masazane of the Muramasa school, and he is considered one of the Three Great Spears of Japan. The blade resembles the shape of a bamboo leaf with beautiful Sanskrit characters and three-pronged sword engraved onto it. The name comes from a legend in which a dragonfly (tonbo) was sliced in half upon landing on the tip of the spear. Although he is big in stature, he has a purehearted and sincere personality.
In this game, he is the only one in the First Team that truly understands Sengo Muramasa.