Early 20th Cent. Japanese 1,000 Face China

This beautiful china was passed to me by my Mother. Her Mother bought most or all it (I'm unsure) in Panama, where they lived. The teacups and saucers are the oldest and were made in the early 1920s. They are incredibly thin, fine china, with great attention to detail. The dinner plates and small sauce or salt bowls, according to one person I spoke with are from the 40s and 50s. I think the coolest pieces, though, are the "snack sets" that have the plate made for a tea cup and a small place for food.
My Father and I used to use this china when he and I prepared 10 course, Chinese feasts for his friends. Kind of how I got into cooking.

I have been unable to find a match for the marks on the china. If anyone knows who the manufacturer is, I'd love to know! Thanks!