noun
salt-seasoned onigiri; rice ball with salt
A simple onigiri seasoned only with salt, without fillings or nori. Often associated with traditional or rustic style.
See also: むすび
祖母が作ってくれた塩むすびは、素朴でおいしかった。
The salt-seasoned onigiri my grandmother made for me was simple and delicious.
遠足には、塩むすびとたくあんを持っていった。
I brought salt onigiri and pickled radish for the school trip.
Compound of 塩 (shio, 'salt') and むすび (musubi, 'rice ball'). The exact historical origin is uncertain, but it refers to a simple, traditional style of onigiri.