According to a story in Japanese news site Mainichi (translated via AnimeNewsNetwork), veteran graphic designer Manabu Daishima passed away on July 30. Daishima was diving offshore Ito, Shizuoka prefecture with two other people. He lost consciousness while diving and was found 30 meters offshore. His fellow divers pulled him from the water and got him to a hospital, but he later died. Daishima was only 45 years old.
Daishima was a long-time employee of Square Enix, back when the company was merely Squaresoft. His first game was Final Fantasy IV in 1991. Daishima was a visual designer who normally worked on background artwork.
He did the field art for Chrono Trigger, 3D map design for Dirge of Cerberus: Final Fantasy VII and Final Fantasy XII, monster design for Romancing Saga, world graphic design for Secret of Mana, background graphic design for SaGa Frontier. His final title was was Parasite Eve: The 3rd Birthday.
Police are still investigating the cause of his death.