Total babies named Kaien (all years): 127
| Year | Boys (count / rank / %) |
|---|---|
| 2024 | 10 / #7995 / 0.001% |
| 2022 | 8 / #9407 / 0.000% |
| 2021 | 6 / #11419 / 0.000% |
| 2020 | 8 / #9113 / 0.000% |
| 2018 | 8 / #9212 / 0.000% |
| 2017 | 8 / #9261 / 0.000% |
| 2016 | 14 / #6185 / 0.001% |
| 2015 | 5 / #13035 / 0.000% |
| 2014 | 8 / #9206 / 0.000% |
| 2013 | 8 / #9216 / 0.000% |
| Year | Boys (count / rank / %) |
|---|---|
| 2012 | 9 / #8504 / 0.000% |
| 2011 | 10 / #7784 / 0.001% |
| 2010 | 7 / #10205 / 0.000% |
| 2008 | 6 / #11803 / 0.000% |
| 2007 | 6 / #11645 / 0.000% |
| 2005 | 6 / #10772 / 0.000% |