This is an old enamel sign for ‘Sai-jo Shoyu (Yamajo)’, which was once used to promote the sale of soy sauce. It is an enamel sign and shows signs of rust and wear due to age. ‘Sai-jo Shoyu’ is a name derived from a grading system awarded to brands of superior quality during the Edo period.As a retro sign from a soy sauce company that no longer exists, it is sometimes traded as an antique. Please refer to the photographs, as they show all the included items and the condition of the item. International Buyers: Import duties, taxes, and charges are not included in the item price or shipping costs. These charges are the buyer’s responsibility. Check with your country’s customs office to determine these additional costs before bidding/buying. These duties are paid to your customs office, not us. Prompt payment ensures item delivery.