The defending champions are the United States, who won the 2015 championship after winning both the 2007 and 2011 editions. The U.S. team did not participate in the World Cup until 2007 and have won every tournament since. Prior to U.S. participation, Japan won the 1999 and 2003 championships.
So most of what you posted is not true.
USA won the first ever Tournament 1991 (as opposed to first participation in 2007)
They particpated and won 3rd place 1995. 8as opposed to your Claim they didn't participate until 2007)
They won again 1999 (as opposed to your assertaion that Japan won that one)
They won 3rd place in 2003 when Germany won the Tournament (as opposed to your assetration that Japan won and the USA didn't participate)
They won third place in 2007, Germany won the title (as opposed top your Claim that USA won and your Claim that never lost since then)
Japan won 2011 against the USA (as opposed to your Claim that the USA won that year and that they never lost after taking part first in 2007).
They won both in 2015 and 2019 so at least two of your Claims have been correct (the one of which I posted the post before and one which was probably all over the press)