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Just to be sure :) You can find Karasu in Aisa and Tomae and even in Uchigumori

Yes i have :)
Many finishing stones have that stamp it is very normal on Ohira stones and Atagoyama
Try to google it with Ohira Kanji and you will find many

Is the labile on the box sun tiger ???
If so its probably Ohira, they sold mostly knife stones from Ohira and Hideriyama



Karasu Strata ??? Hmm no such thing. Karasu can be found even in...