The Naniwa Omura 150 grit stone is a great stone for resetting bevels, quick steel removal, and chip and tip repairs. Being such a coarse stone, it cuts quickly so little time is required to achieve your goals. This stone measures 210mm x 78mm x 55mm.
This stone is a great coarse stone! Doesn’t need much soaking to work (can be used splash-n-go style) yet it can live indefinitely in a bucket of water. If used with light pressure,it leaves a finish similar to 400-600 grit and will quickly erase the scratch marks of a D8XX 120 grit waterstone. If used with heavier pressure,it cuts very quickly (and dishes...) and cuts even quicker once a slurry has built up.
This stone works awesome with the Naniwa Aotoshi 2K Green Brick of joy for quickly grinding and polishing a new bevel (except on something like an Aritsugu,of course).
All extra-coarse waterstones are terrible,but the Naniwa Omura is among the least terrible.
Seconded. I reset the bevel on my French carbon petty in less than 15 minutes with it. The finish was good enough for a quick 1K,4K completion. Incredible!
By: Rob Babcock
The Ohmura does dish a bit but it cuts so fast it’s well worth it. And it leaves a much more polished finish than you’d expect from the grit. It’s easy to jump right to the 2k Green Brick; as Thom says,that’s a killer 1/2 combo. In fact,that’s my normal progression for sharpening German knives.
It’s also a great stone for setting bevels on J-knives. True,it dishes a bit faster but VG-10 and SG-2 both melt pretty quickly at the touch of the Ohmura. The time saved by using this stone is worth the stone spent on the job. Use a bit of pressure and let it build up a thick coating of mud. Mud- that’s key with this stone.
I wish I could give it 4.5 stars. The half star deduction is just be for dishing faster than a DMT. ;)
Cuts fast,dishes fast. The longer this stone soaks the better. Consistent scratch pattern,I can jump straight to medium grit (1k,2k) stones from this one. Great value for its size and price!
By: Houston Ellis
I generally use under running water. I was looking for something to cut faster than my King 1K and Shapton GS500. It delivers. Can use a lot pressure. (Never liked using pressure with the GS series) You can also go very lightly for a finer finish. You can easily jump to 2K. I often jump to the Naniwa 3K SuperStone for my personal knives. They are softer "german" style,however. Amount of dishing is perfectly acceptable for a fast coarse bevel-setter. I leave the DMTís for flattening...hate the feedback from knives through those things!
By: C Flanagan
I just finished touching up bevels on a couple of knives,and I’m thoroughly impressed. Fast and smooth,it won’t dish too badly if you use a light touch and run across the whole stone.