My father was a calligraphy teacher. He seemed to have loved it and used it often. It had a used feel, with dirt and scratches, so I put it in water and washed it, and a lot of the dirt came off. I'm posting photos of it in that condition. I'm not familiar with calligraphy tools, but when I looked up "Amehatashinseki" (Amehata Inkstone), it seems to be a rather high-quality inkstone ↓ ※ I looked into Amehata inkstones ※ [The material is black, dense slate, which absorbs little water. It is rich in fangs (sharp edges), so the ink grinds very well, and it is considered to be of the highest quality as an inkstone material.] ◎ It's been used quite a bit and has a used feel, but if you don't mind the details, please consider it.