This is a demon mask by Fujio Akatsuka. It came from a pull-out from a candy store about 30 years ago. It seems that it was included as a bonus with Setsubun beans by Denroku Co., Ltd. at the time. It was in a file, so it's in surprisingly good condition, considering it's 40 years old. Made in 1987. Now that Fujio Akatsuka has passed away, it is considered a very valuable item. Please refrain from price negotiations.