Japan Coin Appraisal Institute (JCAI), a major domestic third-party inspection body, has become the industry's first to obtain ISO/IEC 17025 international accreditation for ancient coin authenticity assessment and grade evaluation. The certification means JCAI-issued appraisal certificates will be accepted as 'international passports' by major overseas auction houses and financial institutions, expected to significantly boost trust and liquidity for Japanese coins in global trading.