Shūtetsu Nagamoso

is a Shinigami instructor who teaches Zanjutsu to members of the 10th Division.

Appearance
Nagamoso has the appearance of an old man with black hair on the sides of his head. He is bald on top and has a thick black mustache. Nagamoso wears the standard Shinigami uniform.

Personality
When he is teaching Zanjutsu, Nagamoso is serious and maintains discipline among his students, quickly silencing two Shinigami who were chatting about their captain, Tōshirō Hitsugaya.

The Thousand-Year Blood War arc
After the Wandenreich retreat following their first invasion, Nagamoso oversees a group of Shinigami from the 10th Division who are practicing their sword skills. After silencing two Shinigami who are talking about their captain, Tōshirō Hitsugaya, losing his Bankai, Hitsugaya enters the room, prompting Nagamoso to ask Hitsugaya what he may do for him. When Hitsugaya requests he train him in basic sword techniques, a surprised Nagamoso immediately accepts.

Trivia

 * Nagamoso's name is revealed in a volume sketch in Volume 60.