wooden plane with a convex base curved both along and across the blade
Specialized woodworking tool used for shaping concave surfaces; the base is curved in two directions. Compare with 反台鉋, which is curved only along the blade direction.
See also: 反り台鉋
The craftsman finished the curved surface with a shihōsori-kanna.
反台鉋 has a convex base curved only along the cutting direction, while 四方反鉋 is curved both along and across the blade, allowing more complex concave shaping.
Standard kanji spelling for this woodworking tool.
Variant with okurigana り.
Mixed kanji-kana spelling.
Mixed kanji-kana spelling without okurigana り.
Compound of 四方 (shihō, 'four directions') + 反り (sori, 'curvature') + 鉋 (kanna, 'plane'), referring to the plane's curved base in two axes.