Silver 1 Oz. Asahi Round .999+(Box of 100 Coins). Johnson Matthey’s North American refineries and assaying facility were acquired by Asahi Refining in 2016, and active operations there resumed later that year. The mint first created silver bars for the North American market before extending its product line to include these silver rounds. The 1 oz Asahi Silver Round’s obverse features the mint’s name inscribed and the stylized Asahi Refining emblem in the middle. The round’s weight, metal content, and purity are listed around the perimeter of the design field. Asahi Refining’s headquarters are in Tokyo, Japan, although it operates worldwide. Salt Lake City, Utah, Miami, Florida, and Toronto, Canada are among the cities where it operates in North America. Although Asahi is a newcomer to the North American market, the refiner has a 200-year history and is certified by the LBMA and COMEX.