• Manufacturer / Signature: Motonagakuni
• Type: Japanese Sotomarukanna plane
• Sole shape: Convex
• Use: Working concave surfaces and hollow profiles
• Blade width: Approximately 48 mm (4.8 cm)
• Total body length: Approximately 255 mm (25.5 cm)
• Available curvature diameters: 120 / 150 / 180 / 210 mm
• Corresponding radii of curvature: 60 / 75 / 90 / 105 mm
• Blade steel: Aogami No. 1 (Japanese carbon steel)
• Body material: Japanese white oak (Shirakashi)
• Assembly: Traditional Japanese, indicated as 8 to 9 bu by the supplier
• Markings: Motonagakuni signature and curvature number
• Manufacturing: Handcrafted
• Weight: Not provided
• Preparation required: Sharpening and adjustment of the blade and body
• Country of manufacture: Japan

Care and precautions

• Plane supplied not ready for use: sharpening, blade adjustment, and body adjustment required.
• Slight dimensional variations may be present due to handcrafted manufacturing.
• Wipe and dry the blade thoroughly after use to prevent corrosion.
• Store the tool in a dry place, away from moisture.

• Convex sole: allows for planing and finishing concave surfaces, hollows, and rounded profiles.
• Four radius diameters: 120, 150, 180, and 210 mm, to adapt the plane to the shape of the workpiece.
• Aogami No. 1 carbon steel: Japanese steel known for its ability to take a fine and precise edge.
• 48 mm blade: allows for working on relatively wide curved surfaces.
• Japanese white oak (Shirakashi) body: hardwood traditionally used for Japanese planes.
• Identification engraved on the blade: Motonagakuni signature and number corresponding to the radius diameter.
• Handworking hollow forms: suitable for joinery, woodworking, and sculpture adjustments and finishes.