However, you could use these phrases depending on the context:
* "Pinuno ng hukbo" (Leader of the army) - This is a general term and could refer to any military commander.
* "Pangulong militar" (Military president) - This emphasizes the military authority.
* "Hari ng digmaan" (Warlord) - This is a more informal, but evocative, term.
You could also explain the concept of a shogun and use the closest Filipino equivalent, considering the specific context.