for japan ' s national tax agency guidelines regarding present day shin shu japanese sake (rice wine ), refer to the publication ' japan ' s national tax agency shin-shu production quality standard arbitrary items for mention .' 現代の日本酒の新酒の国税庁によるガイドラインについては「日本酒国税庁の清酒の製法品質表示基準による任意記載事項」を参照。
sampling checks were constantly conducted on chogin to ascertain the percentage of silver in them by applying the process of cupellation after lead had been added to remove any impurities; those which did not meet the required quality standard were refined again . 銀座では常に鋳造された丁銀は灰吹法による糺吹（ただしふき）すなわち銀品位の抜き取り検査が行われ、規定の品位の基準を満たさないものは吹き戻され作り直された。
