This very much reads like the whole "China is weeks away from collapse." Every once in a while there is some fear mongering over the Treasury and bonds. This also coming from the Heritage Foundation is rather convenient with their call for fiscal responsibility and measuring the decline as being 3.5 years in the making.
While a US collapse would be good for a lot of the world this is clearly a political ad for Trump and project 2025. As in don't get your hopes up of anything meaningful happening
Thing is that with the rates staying high and the yen rallying against the dollar, there is a lot of incentive for Japanese funds to dump US bonds. Given the huge amount of US debt that Japan holds, this could indeed be a problem for the US. I thought this was a pretty good dive into the dynamics of it https://youtu.be/2RD6kgz8-1Y
I found a YouTube link in your comment. Here are links to the same video on alternative frontends that protect your privacy:
It’s such a cool world we live in where if a few rich dudes in Japan make a decision it can ruin my life. Awesome, that.
Well few rich dudes in Washington also ruined many lives in Japan since plaza accord, so it's just this bad of a company
As much as it sounds that way from an uninformed perspective, this isn't in any way their fault this time around. You can blame the rich dudes in your own country, for having created an imperial system predicated on debt- indebting other countries to their dollar, forcing countries to use their dollar for trade (often at gunpoint- literally, many nations have been destroyed by the US with maintaining this as one of the primary objectives), exporting the dollar as inflation, coercing countries into this system of essentially subsidizing the US and storing their capital (not wealth, capital) in the US (or else- for instance the understanding with the Sauds before they had options, with Japan as well no doubt, was a genuine "or else you're dead)...
Believe it or not, in this case, Japan (and the rest of the world) has been the victim here, not the US (the US working class is absolutely the victims of their leaders for this situation, however). In this context the Japanese ruling class are not "ruining your life"- they are literally taking actions to prevent the burden, that the US has imposed on them and their country ever since the end of WW2 and American occupation, from ruining their lives and economies any further.
I don't think my finances could get much more devastated but on the whole I am for this.