Mafia Kajita (real name: Kajita Ryuuki) is a freelance writer who has been involved in many game, anime, and manga projects. He is also noted for his distinct appearance - [[bald]] head, [[sunglasses]], [[mustache]], and [[leather jacket]]. Kajita is friends with many seiyuu, notably [[Sugita Tomokazu]] on whose [[tomokazu sugita no anigera deduuun|radio show]] he regularly appears as a guest, and [[Nakamura Yuuichi]] with whom he has a [[washaganatv|radio-style YouTube channel]].

SP Tanaka is an alternate personality of his.

He is co-creator of the [[Goho Mafia! Kajita-kun]] manga by providing its material.
マフィア梶田 SP田中 マッフィアート 梶田隆基