Kaisen is a distinctive boys' name in United States, ranking #7266 in 2004 with 10 recorded births. This places Kaisen in the bottom 45% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2025 with 311 births ranking #800. In 2004, approximately 1 in every 198,480 boys born was named Kaisen. RISING Recent data shows the name is currently rising.