Best dating sites for people over 50
International Cupid Popularity: International Cupid is an international dating site with some Japanese members.
Friend Finder Popularity: The international dating site attracts a small number of Japanese single members.
Unfortunately, jp.is in Japanese, so it's difficult for you to use the site, unless you know Japanese well.
But we can only help you as much as the advices above.
You are the person, with your own time, energy, and determination, to make this happen.
To find Japanese singles, you can follow the link above.
Then select Japan as the country and a city such as Tokyo.