STUDIO POTTERY Bowl with Japanese Oriental potter's mark

This lovely old studio pottery pot measures 3 inches or 8cm across and is in perfect condition. There is a good clear Oriental potter's mark underneath, but I am afraid I don't know who or what it says. Perhaps some kind pottery expert out there who knows who it is by might tell me.

I accept payment by Paypal, or bank cheques or Postal orders in Pounds Stirling. Postage and packing will be £2.70 within the UK; airmail post to Europe will be £4.72 ; or the USA, Australia and the rest of the world would be £7.26 . Thank you for looking.

These postage prices are for the cost of postage, plus approximately 50 pence to cover packaging charges, this is for packaging materials and time spent packing the item carefully. I hope this is considered acceptable to my buyers.