What is dutch wife?

A Dutch wife is a long, cylindrical pillow that is a popular sleeping aid in Japan. The pillow is typically about the length of a person's body and is intended to be hugged or embraced during sleep to provide comfort and support. It is called a "Dutch wife" because it is said to have been introduced to Japan by Dutch merchants during the 17th century. The pillow is usually filled with materials like buckwheat, foam, or latex and can be covered in a variety of fabrics. Some people believe that sleeping with a Dutch wife can help alleviate certain physical ailments and improve sleep quality. While the pillow is predominantly used in Japan, it has also gained popularity in other parts of the world, including Europe and North America.