Kazuki is a distinctive boys' name in United States, ranking #12986 in 2025 with 5 recorded births. This places Kazuki in the bottom 7% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1998 with 20 births ranking #3651. Since 1996, the popularity has decreased by 70.6%. In 2025, approximately 1 in every 341,615 boys born was named Kazuki. FALLING Recent data shows the name is currently falling.