Tamago Sando is a popular Japanese sandwich made primarily with eggs. It typically features a creamy filling of mashed boiled eggs mixed with mayonnaise, often seasoned with salt and pepper. The filling is placed between two slices of soft, fluffy white bread, making it a convenient and tasty snack or meal option. This sandwich is commonly found in konbini (convenience stores) and bento boxes across Japan. Its simplicity and rich flavor have made it a favorite among locals and tourists alike. Tamago Sando can also be customized with additional ingredients like lettuce or mustard for extra flavor.