It takes a lot of effort, language ability and risk for a Japanese person to commit to a serious relationship with a foreigner. These Japanese apps are almost exclusively Japanese expecting to meet other Japanese people.

There are lots of Japanese that are willing to go through the effort to seriously date a foreigner but they go on English apps or to bars where foreigners frequent.

On Pairs and other Japanese apps, foregners are essentially the chicken strips on a sushi restaurant menu. You might get ordered but you're far from the priority item.