Shiguma Arakawa
Gender:Male
Relatives: Shinta Arakawa (Pupil) (Former), Kyoji Arakawa (Pupil), Maikeru Arakawa (Pupil), Koguma Arakawa (Pupil), Guriko Arakawa (Pupil), Akane Osaki (Pupil)
Affiliation: Arakawa School
Occupation: Rakugoka (Shin'nuchi)He was Shinta Arakawa's Master. He is one of four Shin'nuchi rank in the Arakawa School. He currently is the master of 5 pupils: Kyoji Arakawa, Maikeru Arakawa, Koguma Arakawa, Guriko Arakawa and Akane Osaki.He is a serious person with his work, he is usually very kind to people and very strict with his students, despite that he has great affection for them.