Koichi Ishii is a games writer, director, artist and producer who started the games industry career in 1900. Since then, Ishii has been working with Square Enix, Square, Square Product Development Division 3 and Grezzo. Ishii started as the director of Crystal War. Then, Koichi Ishii went on to work on Final Fantasy (1987) as the designer. Later, Ishii also was part of the team who developed Final Fantasy XI: Treasures of Aht Urhgan published by Square Enix for PC. Most lately, Koichi Ishii worked on Ever Oasis. At the moment, Ishii is working with Square Enix on Trials of Mana (2020), which was announced for PC, PlayStation 4 and Nintendo Switch.