What we have here is a Japanese baseball jersey, on sale at Ragstock in Minneapolis. They had quite a number of them, and all of them looked like they had seen hard action. Plus they were all very small. I’m not a big guy, and these things would be way small on me. High School jerseys?
In addition, they were made out of some space age material. Double-knit naugahyde?
So far, I have not turned up a Kubara baseball team. I’ll keep you posted though.