Are UNIQLO jeans made in Japan?

Could you please clarify the origins of UNIQLO jeans for me? Are they manufactured entirely in Japan, or do they have any components that are sourced or assembled in other countries? I'm curious about the company's supply chain practices and how they might impact the quality and sustainability of their products. Additionally, does UNIQLO prioritize ethical labor practices in their manufacturing process? Thank you for your time and attention.