I wasn't distinguishing State from Federal. I was distinguishing taxes from any US state and taxes from Japanese sales. From that perspective, state and local sales taxes are a US sales tax.
...also, I don't know what state or locality they charged me tax for, and different places around me in the same state have different sales tax rates due to county and city taxes (ranges from 5% to 7%).
Did you buy it from eBay or something?
After a recent SCOTUS case of Wayfair v. South Dakota it put in place a lot of new precedence. One of those new items being passed by states is what's known as "marketplace facilitator" laws wherein if you are a vendor that facilitates sales, they are making them the liable party to collect and remit the state and local taxes.
Also regardless of where it's shipped from (unless it's shipped WITHIN the state to another city in the state) the tax rate is always based on your ship to address.
Previously, it was based on the seller - and if the seller did not live or operate in the state they were shipping to (highly likely) then they weren't liable to collect and remit the tax. Technically of course, you still owed the tax and are supposed to report and pay it... Of course, no one did that previously.
Ask me more, it's a fun topic that I have to enjoy talking about daily
EDIT: these taxes can also simply be translated to the phrase "Consumption taxes". The point of taxation is where the item is being consumed. Hence, it doesn't matter if it's shipped internationally or domestically. It is presumed that you will be consuming the item, hence, it's taxed.
More info on marketplace facilitator here:
https://quaderno.io/blog/us-marketp...nual sales in,they quality for economic nexus