Shin Kibayashi (樹林 伸, Kibayashi Shin, born July 22, 1962, in Tokyo, Japan) is a Japanese manga storywriter, novelist and screenwriter.
Under the name Yuma Ando, he received the 2003 Kodansha Manga Award for shōnen for writing Kunimitsu no Matsuri.
Besides the main pen-name of "Tadashi Agi", Shin Kibayashi also goes by other pen names: The main characters of Magazine Mystery Reportage were based on then editors of Weekly Shonen Magazine, including Kibayashi who acts as the leader of the team investigating various conspiracies.
On January 14, 2015, it was announced through Nintendo that Kibayashi was writing the story for the fourteenth Fire Emblem game, entitled Fire Emblem Fates.
On August 31, 2021, Netflix announced that they are working with Shin Kibayashi on an original anime series titled Lady Napoleon.