70s vintage green leaves ceramic teapot set, kettle, tea bowl cups, Japan OMC Otagiri?
Unmarked vintage Japan ceramic tea set, looks like 70s or very early 80s OMC / Otagiri to us. (Not surprising these pieces would be unmarked, as they were most often marked with a foil label.)
There's four handle-less cups or tea bowls 3 1/4" in diameter, and a pot without a handle, as shown. This would have had a basket cane handle originally, I think! The whole set is in very good clean condition without chips, cracks, staining or wear.