Kaizen is a distinctive girls' name in United States, ranking #16037 in 2025 with 5 recorded births. This places Kaizen in the bottom 7% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2024 with 9 births ranking #10624. In 2025, approximately 1 in every 321,453 girls born was named Kaizen. STABLE Recent data shows the name is currently stable.
Kaizen is used as a modern English given name, and Behind the Name links it to the Kyson family while also noting that it matches the Japanese word kaizen, meaning "improvement".
This is a very modern example of sound-based naming, where the appeal of the word itself has likely helped the name gain traction. Because more than one influence may be in play, it is best described carefully rather than treated as a simple traditional Japanese personal name.