You only need this patch if you have downloaded version 1 of the AI Beechcraft King Air (B300/350) Series.
For a reason totally unknown to me, the JGSDF textures in the King Air 300 Series package for FSX uploaded yesterday (JYAI_King_Airs_300_FSX_1.zip) all had the same nose letter codes. These amended textures provide the individual codes and on 3 aircraft, the missing tail art