The first appearance of the Hank Mobley Quintet date from August 18, 1957 was on the Toshiba-EMI label (same as King).
This was BN 61006, a limited edition LP.
The liner notes give the following indications:
Recording by RUDY VAN GELDER
Produced for Released (sic) by MICHAEL CUSCUNA
Cutting Engineered by YOSHIO OKAZAKI
Project Directed by HITOSHI NAMEKATA
So it looks like the material (but not the master tapes) was shipped to Toshiba Japan.
If you see a Toshiba/King vinyl LP, get it! Those vinyls were beautifully produced!
The King Records era