For sale I have a very fine Nakayama Mizu Asagi I got direct from Japan many years ago.
The stone measures 215x65x30mm weighs 870g and was rated as LV5 when purchased !
The stone is a really super fine finisher, and I found that it worked very well for me with a nagura progression.
The stone has a very smooth feel with with nice feedback.

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Size:  17.2 KBfrom the UK to US