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 Sony Interactive Entertainment, Square Enix, Square and Square Product Development Division 3. 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 Sword of Mana published by Square Enix for Game Boy Advance. 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.