Japan women's junior national softball team is the junior under-19 national team for Japan.
| Year | Tournament | Results | Source |
|---|---|---|---|
| 1985 | ISF Junior Women's World Championship (Fargo, North Dakota) | 2nd place | [1] |
| 1987 | ISF Junior Women's World Championship (Oklahoma City, Oklahoma) | 3rd place | [2] |
| 1991 | ISF Junior Women's World Championship (Adelaide, Australia) | 12 wins and 2 losses | [3] |
| 1995 | ISF Junior Women's World Championship (Normal, Illinois) | 2nd place | [4] |
| 1999 | ISF Junior Women's World Championship (Taipei, Taiwan) | 1st place | [5] |
| 2003 | ISF Junior Women's World Championship (Nanjing, China) | 1st place | [6] [7] |
| 2007 | ISF Junior Women's World Championship (Enschede, Netherlands) | 2nd place | [8] [9] |
| 2011 | ISF Junior Women's World Championship (Cape Town, South Africa) | 2nd place | [10] |
| 2013 | ISF Junior Women's World Championship (Brampton, Ontario) | 1st place | [11] |