Procurement of high frequency welder for SRF-JRMC Yokosuka, Japan. NOTE: This solicitation is intended only for sources duly authorized to operate and do business in Japan, as prescribed by DFARS 252.... Procurement of high frequency welder for SRF-JRMC Yokosuka, Japan. NOTE: This solicitation is intended only for sources duly authorized to operate and do business in Japan, as prescribed by DFARS 252.225-7042. Prime Contractors outside of Japan must submit documentation that unambiguously demonstrates the Quoter's compliance with DFARS 252.225-7042 (e.g. proof of incorporation) as part of their quotation.