The Kool Krispy Sandwich featured an Original Glazed donut split in half and filled with a scoop of raspberry gelato, a scoop of vanilla ice cream, and a mix of frozen berries. They were offered from April 13 through April 26, 2016 for 420 yen a piece (~$3.93 US).
The chain has offered soft serve-filled donut sandwiches in South Korea previously, as well as soft serve-topped donut sundaes here in the U.S. at select locations, but the gelato and berries made the Japanese offering a little bit fancier.
Photo via Krispy Kreme Japan.