Issai is a distinctive boys' name in United States, ranking #7903 in 1998 with 7 recorded births. This places Issai in the bottom 30% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2006 with 14 births ranking #5896. In 1998, approximately 1 in every 273,045 boys born was named Issai. RISING Recent data shows the name is currently rising.