This study clarifies the relationship between warabe-uta and infant social development, and provides some suggestions for practicing warabe-uta. It was thought that adults sang warabe-uta to their children as part of family education and personality formation; thus, warabe-uta was a transmitted tradition. However, only a few studies explored its connection with child development and growth. Therefore, this study presents the relationships between warabe-uta and infant social development based on a literature review. The results show that each of the warabe-uta practices corresponded to the development of sociality. Warabe-uta was said to be produced based on the concept of development based on people’s empirical knowledge, which has been passed down as an effective type of childcare. Two suggestions for practice were identified: i.e., to sing warabe-uta in mutually subjective relationships, or for a leader with knowledge of infant childcare and common childcare to sing warabe-uta. These results can contribute to the quality improvement of infant childcare, which has rapidly increased in recent years.