This article explores the tradition of cosleeping in Japan, where it has been practiced for centuries. While many Japanese parents continue to cosleep with their children, there is also a growing trend towards independent sleeping arrangements. The age at which children transition to their own beds can vary depending on individual circumstances. Cosleeping has potential benefits such as increased bonding and improved sleep quality, but also carries risks such as an increased risk of suffocation or accidental injury. Ultimately, the decision to cosleep or not should be based on each family's individual circumstances and needs.