"Zatô" was the lowest of the four official ranks (kan'i) within the Tôdô-za - the Kyôto-based guild for the blind established early in the Muromachi Period (1392-1573), and abolished in 1871 (the fourth year of the Meiji Restoration). The three other ranks, in ascending order, were "kôtô", "bettô", and "kengyô" - as in
Shiranui kengyô (1960).
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