The failure that is specific to Japanese broadband
IPv6 is why it works for someone else and not for you
Japanese consumer broadband moved to IPoE early and thoroughly. That is good for everything except this: a dual-stack line gives your browser two ways to reach a site, and when the site publishes both, IPv6 generally wins.
If the tunnel you brought up only carries IPv4, an IPv6-preferred request goes straight out of your real Japanese connection. There is no error, no warning and no indication in the client — which is why this presents as “it just doesn't work for me” rather than as a diagnosable fault.
It is also why the advice that works for a reader in Italy or Canada can fail here unchanged. Rule this out first, before you conclude anything about the address.
The symptom
No error, just a block
Everything looks correct. The client says connected, the flag is American, and abc.com still refuses — or works once and then stops when a different request takes the v6 path. Nothing in the interface tells you a leak happened.
The check
Use a dual-stack IP checker
A checker that reports IPv4 and IPv6 on separate lines, loaded in the same browser profile you will test with. United States on the v4 line and a Japanese address on the v6 line is the whole diagnosis. Single-line checkers hide it.
The fix
Disable IPv6 for the test
Turn IPv6 off on the network adapter, or confirm your client is configured to block it, then re-test. Do it on one computer rather than at the router while you are still establishing what works — changing the router moves every device in the house at once.
This is worth doing before you judge the connection. We have seen readers conclude an address was blocked when it had simply never been used, because every request they made had gone out over IPv6 instead.
One residential U.S. IP — an ordinary consumer address on a U.S. ISP rather than a datacentre range. USip and ABC are separate services, and the plan below is the connection only. ABC.com’s free tier needs no subscription from anyone; what USip does not supply is everything above it — a participating U.S. TV-provider account, a Hulu subscription, or any right to a particular title.
Separate services: these prices are for the USip VPN Residential U.S. IP service only. A participating U.S. TV-provider account, a Hulu subscription and content availability are not included. ABC.com’s free tier needs no subscription at all.