Meaning
小松菜 (こまつな, Komatsuna) is Japanese mustard spinach — a Japanese food (plants, vegetables).
What is Japanese mustard spinach?
Komatsuna ( Brassica rapa var perviridis ) is Japanese mustard spinach. It is stir-fried, pickled, boiled, and added to soups or used fresh in salads. It is described as having a slightly sweet, fresh flavor.