Almost all prints of the "E" type show the combination Harada (carver) and Yokoi (printer), indicating that the original blocks were recut by Harada.
Other prints of "Doi Hangaten" show Itoh as printer, however, no further printers are known to the author in this seal combination.
Printed or painted ukiyo-e images of this environment emerged in the late 17th century and were popular with the merchant class, who had become wealthy enough to afford to decorate their homes with them.
The earliest success was in the 1670s with Moronobu's paintings and monochromatic prints of beautiful women.
His early printings during the late 1930's of various images by artist Koitsu were so superb that he was then apparently promoted to be Doi's "principal printer," a position which he maintained until his retirement from Doi in 1965.
Doi's second "primary printer" then became Seki (SEKI, Kenji; 1940- ) who when at the age of 15 came to Doi in 1955 and began a TEN-year apprenticeship under the watchful supervision of his "sensei," Yokoi.
By the 1740s, artists such as Masanobu used multiple woodblocks to print areas of colour.Beginning in 1965 (Yokoi's retirement) his "Seki seal" first began to appear on prints, when he became Doi's second "primary printer" from the period 1965 to 1995. Doi's third "primary printer" is now Hamano (HAMANO, Masayoshi: c1950- ) who studied under Komatsu Heihachi (printer for the Yoshida Hanga Studio c1970-80's) in the 1970's.He has been working as "primary printer" for Doi continuously since 1995 until the present time.Although many printers have worked for the Doi publishing house especially in the pre-war era, there are only three printers whom we can call the Doi "primary printers," because each of them worked or still works for Doi for an extended period of time.Doi's earliest "primary printer" was Yokoi (YOKOI, Giichi; 1894-c1980) who produced prints continuously for Doi from the period of about 1936 to 1965.