The UAE relies on imports for about 80% of its food supplies, and many Japanese restaurants there also rely heavily on imports for their supplies.
The ingredients for Japanese food are imported both by air and by cargo ship, with ships mainly delivering dry goods such as seasonings etc. Fresh foods that cannot be procured locally are often brought in by air cargo, for example fresh fish (yellowtail, sea bream, eel, etc.) as well as Japanese beef, vegetables, etc.
It seems that some shops use ingredients imported from countries other than Japan, such as Norwegian salmon, Indian Ocean tuna, Omani shrimp etc.