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    vs.      
Masayasu Tanahashi is tied in the series against Hayato Ishii, 1-1.

event round table player one result player two
Grand Prix Okayama 20081319Tanahashi, Masayasu (1781)Won 2-1Ishii, Hayato (1705)
Grand Prix Yokohama 20129130Tanahashi, Masayasu (1776)Lost 1-2Ishii, Hayato (1822)