Wataru is a distinctive boys' name in United States, ranking #11991 in 2006 with 6 recorded births. The name reached its all-time peak in 1996 with 7 births ranking #7940. Since 1996, the popularity has decreased by 14.3%. In 2006, approximately 1 in every 342,520 boys born was named Wataru. STABLE Recent data shows the name is currently stable.