In Persona 3 Reload, Elizabeth sends you on a quest to find a piece of sushi in Japan. However, there are no sushi stores in the game, making the task more challenging.
To find the sushi, you need to visit the Nagasaki Shrine after school hours. Specifically, you should head to the Inari Shrine, a small red shrine hidden away in the area. Interacting with the shrine reveals that someone has left something behind.
Although there is an Academics check to determine if you are at a certain level, the exact level requirement is unknown. In my case, I was already at the maximum level, so I was able to pick up the sushi from the shrine. Once you have the sushi, return to Elizabeth.
Upon giving the sushi to Elizabeth, she eats it in a rather peculiar manner. Despite the sushi potentially sitting in the sun for a few days, you are rewarded with an Ergotite Chunk.
Finding sushi in Persona 3 Reload may seem impossible at first, but with a visit to the Nagasaki Shrine and some luck, you can complete Elizabeth's request and receive a unique reward.
