The baby name Isamu appears in baby name data for the United States from 1915 to 1935. It was most popular in 1922 with 46 babies given the name.
In the later years of this period, Isamu has become less common than it once was.
| Year | Count |
|---|---|
| 1915 | 16 |
| 1916 | 20 |
| 1917 | 24 |
| 1918 | 30 |
| 1919 | 24 |
| 1920 | 34 |
| 1921 | 40 |
| 1922 | 46 |
| 1923 | 34 |
| 1924 | 44 |
| 1925 | 38 |
| 1926 | 40 |
| 1927 | 34 |
| 1928 | 18 |
| 1929 | 18 |
| 1930 | 24 |
| 1932 | 10 |
| 1933 | 14 |
| 1934 | 12 |
| 1935 | 10 |