Adorable San-X Original Sumikkogurashi Mochi Plush keychains Blind Box. It's a surprise which one you will get! San-X Original Sumikkogurashi Blind Box - 1pc Mochi Blind Box Plush Keychains Ages 3+ What is Sumikkogurashi? Sumikkogurashi are characters living a quiet and solitary life in corners. They might be able to settle down when they're in the corners but they don't like being in the center of a space. When they're taken to the center, they always rush back to the corners.