Okay, the user wants me to translate "secret agreement" into Japanese. Let me think about the correct term here. "Secret agreement" can be translated as "秘密合意" (himitsu gyougi). But wait, sometimes "secret agreement" might also be rendered as "秘密協定" (himitsu kyoutei) depending on the context. The difference between "合意" and "協定" is that "合意" is more like an agreement or consensus, while "協定" is a formal agreement or treaty. Since the user didn't provide context, maybe "秘密合意" is safer here. But I should check if there's a more standard translation. Let me confirm. In legal contexts, "secret agreement" is often "秘密合意" or "秘密協定". Hmm. Without more context, I'll go with "秘密合意" as the direct translation. The user's rules say to translate all content into Japanese unless it's already in Japanese. The input is in English, so translation is needed. The output should just be the translation without any explanation. So the answer is "秘密合意".