Nitta

Nitta appears in ''Negima! Magister Negi Magi'' as Director of Academy External Activities of the Mahora Academy. He is part of the school trip to Kyoto and attempts to keep discipline among the students and Negi during the trip by forcing them to sit in the seiza position as a punishment for misbehaving.

Hito Natsu no Kids Game
Nitta appears in Hito Natsu no Kids Game as one of Shinya Matsumoto's and Yuki Kirishima's teachers.

A.I. Love You

 * Main Article: 

Nitta appears in A.I. Love You as Hitoshi Koube's homeroom teacher.

Love Hina

 * Main Article: 

Nitta is a teacher that overlooks exam students during the Entrance Exam at Tokyo University.

Trivia

 * Nitta is currently the only character to appear in all of Ken Akamatsu's in-unverse manga works.