English: Business correspondence on postcards in Japan during Meiji 20s to 30s, or 1880s to 1900s.
The left was posted circa 1881 in Arakichō in present day Shinjuku to Ōdo Kenichi at Watanabe medical clinic at Suidō (ja:水道 (文京区)) in present Bunkyō, Tokyo in November 1881. For adress details see Japan_postcards_verso_002.jpg (right)
The right was delivered circa 1900 to a business in Kōraibashi in downtown Osaka in May 1900. For the content of the messages see Japan_postcards_verso_002.jpg (left)