Wooden bonito flake shaver with lid

This is a lidded bonito flake shaver excavated from my grandmother's house.

?Size: 22cm (length) x 9cm (width)
?Material: Wood
?Quantity: 1 piece

I don't know when it was purchased, but it was stored in the back of a cupboard still in its box, so it is likely unused.

There was something like instructions on how to shave bonito flakes inside the box, so I would like to include it.