JCB, a Japanese bank that has its own payment processing, has been spreading its wings a little in recent years. One thing of note is that the Japanese have circumvented Visa's and Mastercard's attempts to influence and deplatform their businesses by cutting ties with Visa/Mastercard/AMEX and moving towards making JCB the only credit card they process. I'm not selling this as a solution, nor am I optimistic enough to think that they'll happily do business with you, but it may be worth looking into even if it's just for low profile private use. They offer international payments and have been working on growing their influence by offering cards outside of Japan (primarily in Asian territories), but applying for a card may be difficult as someone that does not live long-term in any of the countries that JCB offers their cards in.