Not known yet We don’t yet have a written story, a recipe or a dated or primary source for Shūmai. What we do have is below, with its sources.
From Yokohama (Kiyoken, founded 1908 at Yokohama Station; per Japan's agriculture ministry MAFF it "began selling it to station passengers in 1928", using dried scallop so it "tasted good even when cold").
Pin · Yokohama (Kiyoken, Sakuragichō station)
Reasonably sure. Reference works agree, but we have not yet found a dated or primary source.
The grade comes from the project's source report and has not yet been checked source by source. How grading works.
First record Kiyoken founded 1908, sells shumai to station passengers 1928 (D, MAFF)
Popularised by Yokohama Chinatown.
This entry is drawn from the World Dumpling Atlas, §6.5, the project's source report. Its grade, S secondary consensus, says how far that has been checked against a primary source.
Family A
