Monthly record of Iwasuki's rank (dan/kyu)
month dan/kyu win/lose win ratio
2017 /05 4.07 Kyu 26 win 50 lose .342
2017 /04 5.44 Kyu 20 win 29 lose .408
2017 /03 9.00 Kyu 1 win 1 lose .500
2017 /02 6.00 Kyu 4 win 11 lose .266
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