The humble rice-ball is a staple of the Japanese diet.
Convenient and easy to eat… it originated from finding a way to store and eat rice easily on the go.
They’re often filled with salty or pickled treats to act as a natural preservative.
Pickled plum, salmon and seaweed are classics
The type you buy in the supermarket separate the rice from the seaweed with plastic so it doesn’t get soggy.