What is this?

[Pie]

Here’s one for you guys who know lots of things..

First the kanji. Didn’t notice this at first but there’s definitely words.

Some post flattening pictures and some renge I think. Some sort of sealing still on there.

Random stone chunks from a friend, apparently there was significant toxicity and it got smashed up. For science. Any ideas?

Thanks in advance!

 

[TRPV4]

330mate rock

 

[cotedupy]

I wouldn’t know anything about all that fancy writing now, but I’d say it looks quite similar to this wee Nakayama nagura chunk I got from JNS recently, so it does.