Shohonyama Ōtsuki Ipponsen No.30 Japanese Natural Whetstone (1,448g)
Approx. 210 × 77 × 34 mm
An authentic natural finishing stone from the prestigious Shohonyama region in Kyoto, Japan.
The Ōtsuki Ipponsen (大突一本撰) No.30 is regarded among the elite classes of Japanese natural whetstones, renowned for its exceptional sharpening performance and refinement. Stones from this series are often compared to the finest examples from Nakayama and are highly sought after by experienced sharpeners and collectors.
Hard in composition with minimal slurry generation, this stone excels at producing highly precise edges and exceptionally clean mirror-like finishes. Its dense abrasive structure provides crisp, clear tactile feedback and allows for meticulous edge refinement with outstanding control.
The Ōtsuki Ipponsen line is distributed almost exclusively within Japan, making examples available to international collectors particularly rare.
Specifications & Features
Origin: Shohonyama, Ōtsuki Mine (Kyoto, Japan)
Type: Ōtsuki Ipponsen No.30
(Natural Finishing Stone)
Dimensions: Approx. 210 × 77 × 34 mm
Weight: 1,448 g
Hardness: Hard
(High abrasion resistance with crisp sharpening feedback)
Finish Characteristics:
Mirror-like polish with exceptional edge refinement
Condition: Unused
(Professionally lapped and ready for immediate use)
Protection: Sides and bottom sealed with Ishisan premium water-based protective lacquer
Performance & Application
• Minimal slurry generation for maximum control
• Crisp and highly responsive sharpening feedback
• Produces exceptionally refined and precise cutting edges
• Capable of achieving brilliant mirror-like finishes
• Excellent performance on high-carbon steels and premium blades
• Ideal for advanced sharpening and finishing applications
Recommended For
Kitchen Knives
Achieving ultra-fine, mirror-polished edges on premium Japanese and Western knives.
Carpentry Tools
Precision finishing for chisels (Nomi), plane blades (Kanna), and high-performance woodworking tools.
Straight Razors
Final-stage honing and ultra-fine edge refinement.
Collectors
A prestigious domestic-market stone highly valued for its rarity and elite reputation.
Collector's Note
The Ōtsuki Ipponsen series occupies a respected position among Kyoto's premium natural whetstones. Due to its limited domestic distribution and strong reputation among Japanese craftsmen, examples rarely appear outside Japan.
Its combination of dense structure, mirror-finishing capability, and historical prestige makes this a highly desirable acquisition for both serious users and advanced collectors of Japanese natural sharpening stones.
Authentic Shohonyama Ōtsuki Ipponsen No.30 Natural Whetstone.
Rare domestic-market specimen renowned for elite sharpening performance.
Well-preserved 1,448 g finishing stone from Kyoto, Japan.
A premium collector-grade Japanese natural whetstone offering exceptional precision, mirror-finishing capability, and professional-level refinement.
