In this article, the following points were shown about the historical change from the single iron plane to the double iron plane based on literature, archival photographs and actual samples. 1 In the early Meiji period when the western plane was imported, the construction and working of the double iron plane based on the westernplane had been elucidated. 2 The double iron plane already existed in the middle Meiji period as a plane for handicraft. 3 The double iron plane seems not to have used by artisans (carpenters) in the Meiji period, but it was used in the early Showa period. 4 The cap iron of a double iron plane with a hole in a fixed position is a recycled tobacco mincing blade.

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In this article, the following points are clarified from the interview with craftsmen (Tsubotatsu and Tsubosei) who make wooden inkpots in Sanjo city in Niigata prefecture and related documents. 1 Part names and classification of inkpot used in Sanjo city are distinguished. 2 The production process of inkpot are recorded with photographs. 3 A brief history of development of the production of inkpots in Sanjo city from the late 19th century until the present is clarified.

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