The first and second generations of the Akasaka school, Tadamasa and his son, moved to Edo around the Kan'ei era, where they produced tsuba by adding ingenuity to the Owari-tou method and the Kyo-tou method, and prospered until the end of the Edo period. The 1st, 2nd and 3rd generation (Ko-Akasaka) have good forging of the iron base, and many of them are round and thick with round ears. From around the time of Tadatsuki IV, the tsuba became a little thinner and became more elaborately crafted. The name Akasaka was used from the place where the craftsmen of this family lived (present-day Akasaka area in Minato Ward, Tokyo).
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