Okay, the user wants me to translate "power-base" into Japanese. Let me think about the correct term here. "Power-base" can refer to the foundation or source of power. In Japanese, the term "権力基盤" (kenryoku kiban) is commonly used to describe the base or foundation of power. It's composed of "権力" (kenryoku) meaning power and "基盤" (kiban) meaning base or foundation. I should check if there's any other possible translation, but I think "権力基盤" is the most accurate and widely accepted term in this context. The user didn't provide any additional context, so sticking with the standard translation makes sense. No need to complicate it further. Just output the translation as specified.