Hemp potato, commonly known as "hemp _", also known as "mashi", is an elastic and sticky traditional food made of glutinous rice flour or other starches, which originated in China. What Japan calls cake (もちち/mochi) is actually a new year's cake (the big difference from China and South Korea's new year's cakes is that Japanese new year's cakes are soft and sticky).

In mainland China, it is also called grass cake; in Dalian, it is called "Mo Hunger"; in Taiwan Province, it is transliterated as "Maji".