This flower pattern is famous as the wrapping paper for Rokkatei, a confectionery in Hokkaido. Incidentally, this picture is not the wrapping paper, but the wallpaper of a small house built in the ”Rokka(Rikka)-no Mori(Forest)” in Tokachi, Hokkaido, which I visited last month. This forest is a sightseeing spot operated by Rokkatei, and there are several small houses in the forest that have been turned into museums.
Rokkatei’s flower-patterned wallpaper