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    vs.      
Koutarou Ootsuka is tied in the series against Ren Ishikawa, 1-1.

event round table player one result player two
2005 World Championship980Ootsuka, Koutarou (1823)Lost 1-2Ishikawa, Ren (1834)
2005 World Championship1815Ootsuka, Koutarou (1839)Won 2-1Ishikawa, Ren (1854)