Okay, the user sent "c-spanner". Let me check what that is. A c-spanner is a type of wrench used for tightening or loosening bolts and nuts. Now, I need to translate this into Japanese. The correct term in Japanese is "Cスパナ" or "C型レンチ". Since the user specified to translate into Japanese, I should use the common term. I'll go with "Cスパナ" as it's more commonly used. Also, the user mentioned if the content is already in Japanese, leave it as is. But here, the input is in English, so translation is needed. No explanations, just the translation. So the answer is "Cスパナ".