Antique Japanese Kutani Geisha Chocolate or Tea Pot, Cups & Saucers

This four-piece cups and saucers, with pot, were my great-grandmothers, and is believed to have been part of her high school graduation gift circa 1910/11.

Neither the cups nor saucers have any markings, but under the pot is what I understand to be a Kutani marking. Not sure if this marking is helpful or not in dating this tea/chocolate set.

All the pieces are hand-painted and free from any cracks or chips. Lovely piece to hand down to our daughter.

Would appreciate any help in confirming identity of Kutani, or Kaga, or other, and helping to ascertain age, etc.

Thanks!