Keiichi Hasegawa

is a Japanese screenwriter. He has participated in the screenwriting and series composition of the Ultraman Series.
==Biography==
Hasegawa graduated from Nihon University School of Art and Film Studies and then made his debut as an assistant director by participating in Kuchita Teoshiguruma. He then transferred to the art department to work on props and decorations.
In 1997, Hasegawa went from serving as a script decoration staff member to participating in the screenwriting work of Ultraman Tiga as a screenwriter for the first time. He served as a series compositor in Ultraman Dyna broadcast in the same year.
Since then from 1997 to 2013, he has been in charge of the screenwriting work of most of the Ultraman Series TV series and movies.
==Works==
===Ultraman Series===
Keiichi Hasegawa wrote the following episodes for the following series:
*Ultraman Tiga
**A Fog's Coming
**Blue Night's Memory
**Vampire City
**The Time-Transcending Smile
**Dear Mr. Ultraman
**Town Where the Girl Disappeared
**Goodbye to Darkness
**Master of Darkness
**To the Shining Ones
*Ultraman Dyna
**A New Light (Part 1)
**A New Light (Part 2)
**2000 Attacks
**The Kind-Hearted Target
**The Girls Who Calls Up the Darkness
**The Clarkov Won't Surface! Part 1
**The Clarkov Won't Surface! Part 2
**Star of Peace
**The Smile of Destruction: Part 1
**The Smile of Destruction: Part 2
**The Snow of Venus
**Final Chapter I: A New Shadow
**Final Chapter II: Solar System Annihilation
**Final Chapter III: Toward Tomorrow...
*Ultraman Gaia
**Gamu of the Sky
**The Night of the Marionettes
**Lilia's Maze
**The Determination of Agul
**The Fourth Symphony of a Nightmare
**The Attack of the Forest
**The Cry of the Earth
*Ultraman Cosmos
**Fly! Musashi
**The Flying Whale
*Ultraman Nexus
**Night Assault - Night Raid -
**Strange Creature - Space Beast -
**Giant - Ultraman -
**Subspace - Meta Field -
**Devil - Faust -
**M.P. - Memory Police -
**Doll - Marionette -
**Separation - Lost Soul -
**Darkness
**Apocalypse
**Destiny - Satisfaction -
**Hero 
**Omen - Prophecy -
**Shadow - Unknown Hand -
**Bond - Nexus -
*Ultraman Mebius
**Reverse Shot
**Armor of Vengeance
**Marina of the Wind
**Connecting Message
**The Resurrection of Yapool
**Konomi's Treasure
**Lady of the Blue Fire
**Ace's Wish
**Advent of the Emperor -Final Trilogy I-
*Ultraseven X
**BLOOD MESSAGE
*Ultra Galaxy Mega Monster Battle
**Bemstar Has Arrived!
**The Trap in Belargo City
**Another Monster Tamer
**Unexpected Reunion
*Ultra Galaxy Mega Monster Battle: Never Ending Odyssey
**Great Frenzy! Reionic Burst
**The New Horizon of War
**A Warrior's Grave Marker
*Ultraman Ginga
**Town of Falling Stars
**A Midsummer Night's Dream
**The Closed World
**The Ginga Spark Stolen
**Your Future
===Film Series===
*Ultraman Tiga & Ultraman Dyna: Warriors of the Star of Light (1998)
*Ultraman Tiga, Ultraman Dyna, & Ultraman Gaia: The Decisive Battle in Hyperspace (1999)
*Ultraman Tiga: The Final Odyssey (2000)
*Ultraman Cosmos 2: The Blue Planet (2002)
*Ultraman Cosmos vs. Ultraman Justice: The Final Battle (2003)
*ULTRAMAN (2004)
*Ultraman Mebius & the Ultra Brothers (2006)
*Great Decisive Battle! The Super 8 Ultra Brothers (2008)
*Ultraman Saga (2012)
===Fiction Series===
*Ultraman Dyna Novel: Star of Peace・The・Other (2000)
*Tiga, Dyna, and Ultraman Gaia Novel: The Adventure in Hyperspace (2018)
*Ultraman Dyna: Zero Drive Towards Tomorrow (2020)
===Others===
*Kamen Rider W (2009–2010)
*Kamen Rider Fourze (2011-2012)
*Kamen Rider Drive (2014–2015)
*Kamen Rider Ghost (2016)
*Kamen Rider Saber (2020-2021)
*Kamen Rider Gotchard (2023-2024; Along with Hiroki Uchida)
====Anime television====
*Devil Lady (1998–1999)
*Zoids: Chaotic Century (1999–2000)
*Zoids: New Century Zero (2001)
*Astro Boy (2003–2004)
*Phoenix (2004)
*Hakaba Kitarō (2008)
*Rage of Bahamut: Genesis (2014)
*SSSS.GRIDMAN (2018)
*SSSS.DYNAZENON (2021)
*GRIDMAN UNIVERSE (2023)
==Trivia==
*Keiichi Hasegawa is also the writer for the animated adaptation of Mega Man Battle Network, known as MegaMan NT Warrior (ja: Rockman.EXE), a series similar to Gridman the Hyper Agent in that both feature its titular heroes fighting in cyberspace to stop the villain-of-the-week from terrorizing the real world. When Hasegawa was offered the position of writer for SSSS.GRIDMAN, he acknowledged the similarities of said shows and assumed it would also be similar, but was surprised to see how different it was to the original 1993 series, instead thinking it was closer to Evangelion.https://natalie.mu/comic/pp/ssss_gridman
==References==
Category:Real Life People
Category:Writers