The NAGANO KEISO calibration service center is accredited under JCSS, which uses ISO/IEC 17025 (JIS Q17025) as its accreditation criteria, which is based on the accreditation scheme JIS Z 9358 (ISO/IEC Guide 58). The accreditation body (IA Japan) that operates JCSS (Japan Calibration Service System) is a signatory of the mutual recognition agreement with the Asia Pacific Laboratory Accreditation Cooperation (APLAC) and the International Laboratory Accreditation Conference (ILAC).