My grandmother bought this at a shop in Sakuragicho about 2.3 years ago. She doesn't seem to use it, so I'm offering it for sale. According to my grandmother's memory, it cost around 30,000 yen. There's no tag, so the brand is unknown. The head circumference is about 50cm. It seems the size can be adjusted in two places at the back. It seems it's hardly been used, but please refrain from purchasing if you are concerned.