Vintage OMC Japan Bamboo Ceramic Teapot Tea Set With 4 Cups Made In Japan

Brand: OMC Japan (Otagiri Mercantile Company); Made in Japan.
Item: Vintage Japanese ceramic tea set featuring a teapot with lid and four matching handleless cups.
Color: Cream and beige body with subtle horizontal banding, hand-painted green bamboo leaf design, and dark brown banding near the base.
Material: Glazed ceramic/stoneware with smooth glossy finish inside and out.
Details: Round teapot with side handle and straight spout, matching fitted lid with steam hole, footed yunomi-style cups with swirl-glazed interiors and unglazed foot rings, coordinated bamboo brushwork decoration on all pieces.
Markings: Original gold foil sticker on base reads "OMC" and "Japan" confirming Japanese manufacture.
Condition: Previously used set showing light general wear; teapot has some dark discoloration on the handle near the spout; interiors of teapot and cups show light use marks but no chips noted on the cups; please review photos for close-up views of wear and flaws.
Special notes: Attractive