It may be due to improper flour, unbalanced ratio of flour and water, insufficient time, excessive proofing and insufficient or excessive kneading of flour.

The flour used to make potato should be high gluten flour or bread flour. The ratio of flour to water is unbalanced, and too much liquid is added when making hemp potatoes, which will lead to too thin noodles, which will lead to the withering of the made hemp potatoes. The baking time is short, and it is not fully mature. Therefore, the temperature should be lowered appropriately and baked for a few minutes while observing.

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).