Meaning
餡子 (あんこ, Anko) is Red bean paste, a Japanese food (ingredients).
What is Red bean paste?
Anko is a paste made of red beans ( azuki ), used in East Asian cuisine. The paste is prepared by boiling the beans, then mashing or grinding them. It is often additionally sweetened. The color of the paste is usually dark red, which comes from the husk of the beans. Anko is used as a filling in many Japanese sweets.