Adachi Ginkō (安達 吟光) was a Japanese artist best known for his prints in the ukiyo-e style as a member of the Utagawa school. He worked in a variety of genres, including portraits of beauties and actors, landscapes, book illustrations, and satirical works, and produced a large number of triptychs of contemporary events. His most successful work was his Pictorial Outline of Japanese History series of triptychs in the late 1880s. He was jailed and fined in 1889 for caricaturing the Meiji Emperor.
Few details of Ginkō's birth and early life are known; his birth name was Adachi Heishichi. He was born about the second month of Kaei 6 on the Japanese calendar (about March or April 1853).
Ginkō studied under the painter Goseda Hōryū [ja], who worked in a Western style. Ginkō may have begun designing ukiyo-e woodblock prints as early as 1870, though these purported prints of the Boshin War have not survived. Ginkō's earliest surviving prints date to 1873—a number of yakusha-e prints of actors in the style of Toyohara Kunichika. He published his early work under the art name Shōsetsusai Ginkō. He found success with a series of actor prints titled Complete Issue of Top Battle Stories in 1874. Later that year he began using the art name Adachi Ginkō.
Ginkō produced in a variety of genres, including bijin-ga portraits of beauties, landscapes, book illustrations, and satirical works. A large number of his works dealt with contemporary events such as the Satsuma Rebellion and the First Sino-Japanese War. His most popular work was the series of triptychs Pictorial Outline of Japanese History, published from 1185 to 1889.
The 28 February 1889 issue of the Journal of the Society of Ready Wit published a cartoon by Ginkō which parodies his own print View of the Issuance of the State Constitution in the State Chamber of the New Imperial Palace., which shows Emperor Meiji receiving the Meiji Constitution of 1889. The original, a full-colour triptych, was produced on commission and not distributed until 14 March 1889; prints had to get censor approval before distribution, while books and magazines did not have to be sent to the censors until after they began distribution. The parody replaces the Emperor with a skeleton and is captioned: "Promulgation Ceremony for the Sharpening of the Ready Wit Law". The skeleton was a play on words of the name of magazine's publisher Miyatake Gaikotsu, whose given name is a homophone of the Japanese word gaikotsu.
Ginkō was imprisoned for a year and fined 50 yen for the offense. Miyatake was imprisoned for three years, all others involved were also given prison time, and the magazine was made to cease publication. Following his release, Ginkō continued to produce prints, the last known of which appeared in 1908. His date and place of death are unknown. Ginkō also worked under the art names Shinshō Ginkō, c. 1877) and Shōsai Ginkō, c. 1881–89), and was a member of the Utagawa school of ukiyo-e artists.