noun
padded sleeveless kimono jacket; Japanese vest
A traditional padded, sleeveless jacket worn over a kimono for warmth, often associated with children or elderly people.
祖母がちゃんちゃんこを着てこたつに入っている。
My grandmother is sitting under the kotatsu wearing a padded sleeveless jacket.
子供の頃、冬はいつもちゃんちゃんこを着せられ
When I was a child, I was always made to wear a padded vest in winter.