A lot of the hooks offered by the top companies like Daiichi, Owner and Gamakatsu are made in Japan or other Asian countries besides China however you have to check and sometimes buy through the Japanese Domestic Market (JDM) to get the Japanese hooks.
BTW - When I have a choice I do what you are doing.
When I'm unsure I send the manufacturer an email and ask the them the country of origin (COO). Sometimes they will dance around the answer, but they will divulge if pressed.
I had done some research on this subject about 3 years ago and it seems like eagle claw is the only U.S.A manufacturers of fishing hooks . I did find that some Umpqua hooks were manufactured in Czech Republic ( competition jig hooks) . Seems like rest of the companies are made in China , and Japan .
America has never been a major source of hooks. In the past, the vast majority of hooks in the world were manufactured in Redditch, England. Since the second world war, most of the manufacturing moved to either Norway (Mustad) or to east Asia.