If you are currently using a scanned PDF from 1998, beware of these changes in the current revision (JIS B 1702-1:2015):
This standard establishes a system to classify the accuracy of individual cylindrical involute gears. It focuses on "flank tolerance," which refers to the physical accuracy of the tooth's surface. jis b 1702-1 pdf
This part of the JIS B 1702 series specifically addresses deviations relevant to the flanks of gear teeth. It defines critical parameters for measuring accuracy, including: If you are currently using a scanned PDF