This print, Omoshiro Sō or Omoshiroki Sō, shows a young woman smiling at herself in a mirror, admiring her blackened teeth. Ohaguro (お歯黒), the practice of blackening teeth, was used as a sort of make-up in Japan from around Kofun period (300 to 538 AD) to the early Meiji period (1868-1912). It was considered to make people (both men and women) more attractive, as pitch black objects like lacquer were thought to be very beautiful.

This particular print is from the Fujin Sōgaku Jittai ("Ten Physiognomies of Women") series by Utamaro.

Please refer back to the description of this set as a whole to find more information on other aspects of this print.