Naniwa Basic　（Former Multi Stone） 

Model for Sharpening Beginner to Get Comfortable Sharpness 
To revive blunt knife 

 
MV-502/510
One Double-sided Sharpening Stone with Coarse-Medium Side 

Coarse side (220 grit): To repair chipped blade 
Medium side (1000 grit): To make a blunt knife blade have good sharpness 
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MV-510/530 
One Double-sided Sharpening Stone with Medium-Fine Side 
 
Medium side (1000 grit): To make a blunt knife blade have good sharpness 
Finishing side (3000 grit): To get better sharpness