These are the people responsible for creating Phantasy Star IV.

Directors
Reiko Kodama, Tohru Yoshida, and Kiyoshi Takeuchi
Planners
Kazuyoshi Tsugawa and Akinori Nishiyama
Programmers
Yoshiaki Endo, Daisuke Yamamoto, Masatoshi Shibata, and Makoto Funabashi
Original Story Plan
Tohru Yoshida
Script
Akinori Nishiyama
Sound Direction
Izuho "Ippo" Takeuchi
Battle-System Plan
Kazuyoshi Tsugawa
Battle Program
Yoshiaki Endo
Battle Program Assist
Makoto Funabashi
Monster Graphic Design
Kazuyoshi Tsugawa, Tohru Yoshida, Akinori Nishiyama, and Tsukasa Mori
Battle Background Design
Reiko Kodama and Kazuyoshi Tsugawa
System Plan
Akinori Nishiyama
System Program
Daisuke Yamamoto
System Program Assist
Masatoshi Shibata
Field Graphic Design
Reiko Kodama
Character Design
Tohru Yoshida
Mechanic Design
Kazuyoshi Tsugawa and Akinori Nishiyama
Map Design
Tohru Yoshida, Akinori Nishiyama, Kazuyoshi Tsugawa, and Tsukasa Mori
Object Design
Akinori Nishiyama, Kazuyoshi Tsugawa, Tohru Yoshida, and Reiko Kodama
Font Design
Akinori Nishiyama
Visual Event Plan
Tohru Yoshida
Paper Event Plan
Akinori Nishiyama
Event Program
Daisuke Yamamoto
Event Program Assist
Masatoshi Shibata

Visual Event Graphic
Tohru Yoshida, Reiko Kodama, Kazuyoshi Tsugawa, and Tsukasa Mori
Music Compose
Izuho "Ippo" Takeuchi and Masaki "Gakichan" Nakagaki (Yoshimi Nakagaki)
Sound Program
Izuho "Ippo" Takeuchi and Yoshiaki Kashima
Sound Effect
Izuho "Ippo" Takeuchi and Masaki "Gakichan" Nakagaki (Yoshimi Nakagaki)
Japan Cover Art
Hitoshi Yoneda
North American Cover Art
Boris Vallejo
Producer
Jerry Markota
Product Manger
Jaime Wojick
Coordinator
Masanobu Tsukamoto
Text Translation
Shippy Ohka
Text Editors
Jerry Markota, David Forster, and David Wood
Lead Tester
David Forster
Assistant Lead Testers
David Wood and Gregg Vogt
Testers
Crisi Albertson, Janine Cook, John Amirkhan, Derek Carmichael, Arnold Feener, Todd Pifer, Stanley Weaver, Mike Callahan, Ed Chennault, Randy Kreidt, Rachael Bristol, Peter Clark, Mark Griffin, Michael Wu
Manual
Wendy Dinsmore
Special Thanks
Clint Dyer, John Sauer, and Rick Raymo

Fun Facts

Did you know these bits of trivia?

Izuho "Ippo" Takeuchi was the only returning staff member from Phantasy Star III.

Clint Dyer wrote one of the earliest walkthroughs for Phantasy Star.

Boris Vallejo, the North American cover artist, is a famous fantasy artist. Many books collecting his work have been published.