Yup. This is painful 2 hear for Japanese, but in my view the chances of that are far above 90%.
Every so often they're digging up ancient stuff in Japan, and the Imperial Household Agency swoops in and tells them flat-out to STOP and just shut up.
Basically that's cuz they're turning up super old stuff that's clearly from Korea and this drives some rigth-wingers (and even some non-political types) sort of nuts.
I would think they’d prefer to find they are descendents of Koreans rather than Chinese.