|(浅間三太夫, Asama Sandayū)|
|Movie||Naruto the Movie: Ninja Clash in the Land of Snow|
When he was young, he lived in the Kazahana Castle. When it was burned down, he and Koyuki left the remnants of the place, and ever since then has become her personal assistant. Before his death, it was later revealed that he was once part of the 50th Brigade.
Despite not being shown in combat, the fact that he previously served as a soldier, hints that Sandayū had extensive military training. He was also seen wielding a sword. Prior to his death, Sandayū proved to possess some basic leadership qualities, rousing his comrades and leading the attack against Dotō.
Sandayū hired Team Kakashi to escort Yukie to the Land of Snow. He suggested this location to Yukie's movie director, so that he could bring her back to the land and make her the heiress of the throne which Dotō Kazahana had stolen.
When they reached the Land of Snow, Dotō arrived at the movie set. Later, Sandayū led a group of samurai to attack Dotō, in the hopes of avenging the late daimyō Sōsetsu Kazahana, Dotō's brother and Koyuki's father, which the latter was killed ten years ago. However, Dotō's ninja subordinates launched multiple waves of kunai from their mortar-mounted train compartments, massacring the entire brigade. Later before his death after Dotō's retreat, Sandayū managed to tell Koyuki not to cry for him with his dying breath.
After Dotō's demise and the new land became the Land of Spring, Koyuki became the new daimyō and saw the vision of Sandayū and her father until they disappeared.