This article examines the history and modern day attitudes of Japanese parents sleeping with their babies. Co-sleeping is a common practice in Japan, dating back to the Edo period (1603–1868). It provides infants with a sense of security and helps improve bonding between parent and child while promoting breastfeeding success. There are also benefits and risks associated with co-sleeping, such as an increased risk of SIDS if safety precautions are not taken. In modern day Japan, attitudes towards co-sleeping have shifted slightly but it remains popular among many families who choose this method of parenting. With proper safety precautions taken into account, this can be a great way for parents to bond with their children while providing them with a sense of security during the night.