Think everything from classic ume plum and salmon flakes to more unlikely combinations like bacon and cheese or curry and ...

Now the cooked rice is ready. 1. Prepare the onigiri fillings. Tuna-mayo: Mix the tuna with mayonnaise and black pepper. Ume: Remove the seed from umeboshi. 2. Spread the cooked rice on plastic wrap.

For instance, “Kaitaku onigiri” (Pioneers’ onigiri) had umeboshi (salted pickled plum) for its filling, a sprinkling of salt and sesame on the rice, and was slightly grilled before it was ...