Abstract
ABSTRACT A Japanese cryptologist claimed that he attended a meeting between Japanese diplomats and controversial US cryptologist Herbert O. Yardley in 1929 at the Japanese Embassy. Since this eyewitness account has not been previously known to Yardley researchers, it deserves to be reviewed objectively to see if it contributes anything of substance to the further shaping of the Yardley legacy. This article scrutinizes the written evidence as provided in two accounts of the meeting, one of which is recorded in the memoirs of senior Japanese diplomat Kase Toshikazu. The author of this article, who had been skeptical of a Yardley-Japan meeting, now believes that it most likely did occur.
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