Withdrawn Stone pass around?

[pentryumf]

I have a stone that I am not sure what mine it is from. It is on the softer side, approx 3 to 3.5, will self slurry.
The stone is clean with one side slightly harder then the reverse.

I believe this stone was purchased from MetalMaster.JP when they still had stones.

I am interested in trying a few different stones and possibly trading for what have you. I would like to present to KKF that if anyone was interested I would pass this around to get any possible info or possible trade.
Dimensions are (mm): 210 x 63 x 36

I am putting approx value at 80$

 

[pentryumf]

Masakage Koishi Nakiri, after a 5 minute rub with light pressure. Swarf builds quickly, the dark spots on the stone are abrasive but only if heavy pressure is applied. I am trying to lapp them out, which is time consuming. But it's popping hairs with ease.

 

[DanielC]

Looks Aiiwatani to me.