Seal Netsuke - Insho Netsuke

...They are inserted between the obi belts. (6) Those incorporating magnets or sundials, and those with seals engraved on the bottom, such as the "seal netsuke," are rare examples. In a word, the distinctive feature of netsuke is that, although they are small, many of them are excellent works of art, made with carefully selected materials and using high-level techniques.

*Some of the terminology that refers to "seal netsuke" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…帯の間に挿し込んで用いる。(6)は磁石や日時計を組み込んだもの，底面に印章を刻み実用とした〈印章根付〉などは，その珍しい事例である。　根付の特色を一口で言えば，小品ながらその多くが，材料を吟味し水準の高い技法を駆使して仕上げられたすぐれた工芸品であること。…

※「印章根付」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報