Hi guys. A text I read by Son Duk Sung saying that he awarded Choi a 4th dan. Later Choi requested a 6th dan but was denied then the 4th dan title was revoked by Son Duk Sung who was the the head of Chung Do Kwan at the time. So at the moment it sees like the only certification as a black belt was from Funikoshi sensei. But are there any records that back up the 2nd Dan claim?