The Umezono teahouse was founded in 1854, in a corner of the Baion-in temple, a branch of the Sensoji temple.
The name of the teahouse, Umezono, is in reference to the many plum trees in the garden.
For more than 170 years it followed tradition as a sweet store specializing in sweet red bean paste.
In a passage from Nagai Kaifu's famous novel "Odoriko," he writes, "I wanted to eat Oshiruko (sweet red-bean soup) at Umezono, but it was too crowded to enter.
In August 1948, the restaurant was reorganized as a corporation, and is now one of the leading sweet shops in downtown Tokyo.