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    vs.      
Ken Ishimaru is tied in the series against Takayuki Nagaoka, 1-1.

event round table player one result player two
Grand Prix Kitakyushu 2009647Ishimaru, Ken (1721)Won 2-1Nagaoka, Takayuki (1813)
Grand Prix Kyoto 201910121Ishimaru, Ken (1753)Lost 0-2Nagaoka, Takayuki (1841)