Used a few times, but it's almost like new. ■ Product Name: Wooden Pillow (Hard Wooden Pillow) Made of Paulownia Wood (Nishiki Health Equipment) ■ Size: SS (Height 6cm) ■ Product Details: The bottom plate is plywood, but the rest is made of paulownia wood. The Nishiki wooden pillow is a kamaboko (fish cake) shape, and when you sleep with it conforming to the curve of your neck, the weight of your head pulls on your neck, and it is used to correct the distortion (subluxation) of the cervical vertebrae. ■ How to Use: Use it on a flat floor or on a thin futon as much as possible. If you are using it for the first time, your neck may hurt, in which case, after using it for about 1 to 5 minutes until you get used to it, switch to a regular pillow. Repeat this process, gradually increasing the usage time, and eventually use it throughout the night. Also, you can wrap a face towel around it to adjust the height and prevent stains. By the way, the regular price on Amazon is 6,150 yen.