The Iran conflict is pushing Japan into a corner and accelerating the breakdown of the dollar system — bad news for the US bond market and anyone holding dollars.

• Japan is burning through reserves to cap power bills because oil stays expensive and their debt is already 250% of GDP, leaving no room to borrow more.
• Japan's 10-year bond yield just hit a 30-year high, and if Tokyo is forced to sell US Treasuries to defend the yen, it would push US yields higher too.
• Foreign buyers of US bonds are quietly walking away, shrinking from over 50% to just above 30%, while the US still needs to borrow $900 billion in the next five months.
• Saudi Arabia cut its US bond holdings and is reportedly taking yuan for oil from China, then converting it to gold through Switzerland — bypassing the dollar entirely.
• China has cut Saudi oil purchases by more than half as Russia undercuts on price, squeezing Saudi Arabia and pulling it deeper into the yuan-gold system.

Outlook: If the Iran standoff drags on, expect higher US yields, more pressure on Japan to sell Treasuries, and more Gulf oil sales settling outside the dollar.