Keigo Koyanagi

is a Japanese screenwriter. He has participated in the screenwriting of the Ultraman Series.
==Biography==
In 2006, Koyanagi joined an animation production company and worked on production management and setting creation. In 2011, he left the company and became a freelance screenwriter. Since then, he has worked on the scripts for many animation works. 
In 2016, Koyanagi took on the first story composition and script for an original robot anime that was broadcasted. After that, he served as the story composer along as the scriptwriter for popular anime works with themes such as vampire legends, werewolf legends, and heroes in fantasy worlds. In recent years, he has been in charge of military research in various works, contributing to enhancing the entertainment value of works through military depictions. 
Koyanagi participated in the Ultraman series for the first time as a military adviser in Ultraman Z and worked as a scriptwriter for Ultraman Trigger: New Generation Tiga. 
In 2023, Koyanagi serves as series composition for Ultraman Blazar.https://tsuburaya-prod.com/news/6028https://m-78.jp/news/post-6706
==Works==
===Ultraman Series===
Keigo Koyanagi wrote the following episodes for the following series:
*Ultraman Z - Military adviser
*Ultraman Trigger: New Generation Tiga
**Inter Universe
**The Propagating Invasion 
*Ultraman Blazar
**First Wave
**The Man who Created SKaRD
**The Name is Earth Garon
**Moonlit Memories
**Visitor 99
**The Approaching Third Wave
**The Ones Who Embrace the Earth
===Fiction Series===
*Life-Threatening Decision Height ―The Story of STORAGE's Founding― (2021)
==References==
Category:Real Life People
Category:Writers