Okay, the user wants me to translate "cost-ineffective" into Japanese. Let me think about the right term here. The direct translation might be something like "費用対効果が悪い" but maybe there's a more standard term.
Wait, "cost-ineffective" is an adjective, so I need an adjective in Japanese that conveys the same meaning. The phrase "費用対効果が悪い" is a literal translation, but maybe "非効率的な" is better. However, that's more about inefficiency in general, not specifically cost-related.
Another option could be "費用がかかる" but that's more about being costly rather than ineffective. Hmm. Maybe "コストが合わない" is a common expression. Let me check. "コストが合わない" does mean that the cost doesn't match the benefit, which aligns with "cost-ineffective."
Alternatively, "費用対効果が悪い" is also used, but perhaps "コストが合わない" is more concise. I should confirm if there's a standard term. In business contexts, "非効率的な" might be used, but again, it's more about inefficiency.
I think "コストが合わない" is the most appropriate here. It's a direct and commonly used phrase in Japanese to describe something that's not cost-effective. So the translation should be "コストが合わない."