Japanese Rice Ball Onigiri おにぎり
Onigiri お握り or 御握り, is a Japanese rice ball made with white rice and shaped into traingular or oval shapes, it can be wrapped in seaweed (nori 海苔). An onigiri is normally filled with pickled ume (umeboshi 梅干), salted salmon, katsuobushi, kombu, tarako, or any other salty or sour ingredient as a natural preservative. You can easily get it from convenient stores in Japan.
I made an onigiri in Japan, with a very simple ingredients and procedures to follow. Those ingredients can easily get in Malaysia too.