An "egg sando" is a popular Japanese sandwich that features a filling primarily made of hard-boiled eggs. The eggs are typically mixed with mayonnaise and sometimes seasoned with salt and pepper, creating a creamy and flavorful spread. The sandwich is usually served on soft, crustless white bread, making it easy to eat and enjoy. Egg sandos are often found in convenience stores and cafes across Japan, and they are a favorite among locals and tourists alike. This simple yet satisfying dish can be enjoyed as a quick snack or a light meal, showcasing the Japanese approach to comfort food.