Snowpea. (Pisum sativum var. saccharatum). サヤエンドウ。
A variety of pea eaten whole in its pod while still unripe. The pod is soft because it lacks inedible fiber. In France called "mangetout" (eat all).
In Japan, used whole as an ingredient in stir-fried dishes or as ingredient in for example miso soup. Sauteed, the green shoots of the snowpea are popular in Chinese cooking as well.