Yeah, it's literally the same as the title on the page so I get it, but unfortunately it's a hot-button political issue and people are eager to misinterpret.
I'd suggest something like: "Japan Post stops accepting US shipments over $100."
I'd suggest something like: "Japan Post stops accepting US shipments over $100."
To emphasize that it's not in effect yet and that it's to, not from.
edit: Someone went and reverted it to something less clear than everything else