noun
inkstone case; inkstone box
A traditional box for storing calligraphy tools, especially the inkstone (硯). Often part of a larger set (硯箱) used in Japanese calligraphy.
祖父の硯箱には、古い墨と筆が入っていた。
My grandfather's inkstone case contained an old ink stick and brush.
Compound of 硯 (suzuri, 'inkstone') and 箱 (hako, 'box'), with rendaku voicing of 箱 to ばこ.