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Prizes and recognition
Note
The table follows the chronology of the City of Ōta and the Tōbunken obituary. The years of the prizes from 1959 to 1972 other than the Masamune are not given one by one in the sources consulted. The sources do not agree on the number of Masamune Prizes: three for his city, Kotobank and the Japanese Wikipedia, and two for Tōbunken, which calls the 1978 one “the second”.
Levels of evidence
HD Documented fact
It is on record in a document that can be consulted: the certificate, the register, the blade itself.
AT Attribution
An identifiable source states it — a description, a table of smiths — and it has not been checked separately.
II Interpretation
Our reading of the facts; reasoned, but open to debate.
PC Yet to be checked
The datum or its check is missing; it will be said when we have it.