I understand the primary language English (2924) and the secondary language Japanese (2962) as the specifications of Power VS,
If the console is in English only, Japanese application logs and messages will not be displayed.
so problems cannot be identified in restricted states (only the console can be used, in case of trouble).
Therefore, I received the answer from Power IaaS Support, "I can't do it because of the function limitation of Novalink."
In order to implement in the Japanese environment, the console environment must also be available in the Japanese environment.
After verifying here, if the host code page is equivalent to "939", we think that both English environment and Japanese environment can be used.