japanese what is?

[Raffaello Carola]

Hello,

please I think is japanese what is? found in an old box with
military buttons size in cm is 1,5 x 5,5 cm. the construction
material I think is graphite. Thanks in advance
cheers, Raffaello

[Jareth]

ink block ?

[gunto]

Block for lacquer seal?

[checkit]

Ink Block

[Fukuoka]

I think it is a weight to hold down the paper when practicing Chinese calligraphy (書道 shodou or 習字 shuuji). Is that what you both meant by 'ink block?'

[ZERO-sen]

paper weight.