20062006: 5 births, rank #12,055
2007: 11 births, rank #7,094
2008: 18 births, rank #5,067
2009: 18 births, rank #5,102
2010: 15 births, rank #5,741
20112011: 19 births, rank #4,822
2012: 26 births, rank #3,894
2013: 34 births, rank #3,189
2014: 42 births, rank #2,805
2015: 56 births, rank #2,328
20162016: 51 births, rank #2,477
2017: 63 births, rank #2,154
2018: 78 births, rank #1,901
2019: 81 births, rank #1,849
2020: 103 births, rank #1,579
20212021: 158 births, rank #1,218
2022: 257 births, rank #902
2023: 487 births, rank #587
2024: 608 births, rank #502
20252025: 895 births, rank #364
Kaizen rose from #502 to #364 for boys between 2024 and 2025. That year also produced its highest recorded birth count, at 895.