Nubatama Bamboo #150 (Orange)
Ken Schwartz called this his favourite low-grit stone, and said everyone could use one to boost the bottom end of their kit regardless of what else they own.
| Feature | Specification |
|---|---|
| Brand | Nubatama |
| Type | Synthetic |
| Grit | #150 (Extra Coarse) |
| Series | Bamboo (Orange) |
| Binder Hardness | Standard |
| Profile | 205 × 75 × 50mm Brick |
Buy This Stone If You're
- Converting the deep scratch pattern left by an Atoma 140 or similar coarse diamond plate.
- Reprofiling and heavy repair where a 24 or 60 grit stone would be too aggressive.
- Wanting a coarse stone that dishes slowly enough to hold its shape through long sessions.
- Hoping to jump straight from coarse work to a 1000-grit stone on less abrasion-resistant steels.
Water
Nubatama range stones should not be permasoaked. Let dry fully before storage; coarse stones hold water a long time.
Progression Ideas
- Preceding Step (Lower Grit): Nubatama Ume #25 Aratae, or a coarse diamond plate.
- Following Step (Higher Grit): Nubatama Bamboo #320 Platinum, or straight to a 1000 depending on the steel.
Ken Schwartz Video
- Atoma 140 Diamond Lapping Plate and Nubatama Bamboo 150 – Part one of three
- Atoma 140 Diamond Lapping Plate and Nubatama Bamboo 150 – Part two of three
- Atoma 140 Diamond Lapping Plate and Nubatama Bamboo 150 – Part three of three
Notes
- Leaves a finer finish than either 120-grit Nubatama despite being the faster cutter.
- Wears slowly for a coarse stone, with 50mm of stone to work through.
- The first Nubatama offered in the 1×6" aluminium-backed EdgePro size.
- On less abrasion-resistant steels Ken jumped straight from here to a 1000 — an eightfold step.
Read More
- Nubatama Bamboo 150 vs. Shapton Glass 220 – Head-to-head on scratch conversion and dishing, and where each fits a progression.
- Atoma 140 & 150 Nubatama Bamboo – The three-part video series in full, with notes on the VG10 and carbon steel test blades.
- Nubatama Bamboo 150 Review – A long owner review covering three different soaking approaches and what each changes.
- Coarse Stone To Use Before Naniwa Pro 400 – Where a 220 belongs between a 150 and a 400, and when to skip it entirely.
- Quick Overview Of Nubatama Stones – A tour of the whole line and which coarse grits earn their place in a kit.
- Learn From My Mistakes… Stones Cracking – Permasoaking and drying guidance for the full Nubatama range, and why it matters.
Condition
- Stone: New and unused.
- Packaging: While our inventory is new, the original packaging may show minor shelf wear, scuffing, or external softening due to warehouse storage and handling over the last five years. Internal protective wrapping (plastic or paper) may show signs of handling, minor tears, or may occasionally be absent—this never affects the condition of the stone itself.
Shipping
Orders are typically processed and shipped same day from Santa Maria, CA.
Every stone ships in a new, high-quality box, individually wrapped in bubble wrap and packing paper for maximum protection in transit.
Please reach out with any questions before or after purchase — happy to help.
Return policy
At Pacific Waterstone, we stand behind the authenticity and quality of every stone we sell.
Incorrect or Mislabeled Items
If you receive an item that is mislabeled, damaged, or significantly mischaracterized in its listing, we will make it right. You may return the item for a full refund or exchange with no restocking fees, and we will cover all return shipping costs.
Standard Returns
If you change your mind or wish to return an item for any other reason:
- Returns are accepted within 14 days of delivery.
- Items must be returned in their original, unused condition with all original packaging.
- A 10% restocking fee applies to cover processing costs.
- Return shipping costs are the responsibility of the customer.
To initiate a return, please contact us with your order number and the reason for your request.
Provenance
Everything we carry comes from the personal collection of Ken Schwartz — the sharpener behind Precise Sharpening, who built the Nubatama line and gathered the naturals that sat beside it on his bench. The synthetics are new and unused. The naturals were his.