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

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