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

event round table player one result player two
2005 World Championship980Ishikawa, Ren (1834)Won 2-1Ootsuka, Koutarou (1823)
2005 World Championship1815Ishikawa, Ren (1854)Lost 1-2Ootsuka, Koutarou (1839)