No would not be !! These were stamped at the factory with the impressed mark !! It was made in the mold or stamped as greenware while the clay was soft !! Hull,, Hall and others were made here and usually have “Made in USA” or just USA on them !! They never used Japan made items !!
Many like the roosters for decoration !! Best is to check ebay and see what similar size ect are selling for !! My guess is around $20. for the pair !!