Vintage Nevco (Nevoco) Japan ceramic mug. Bright yellow glaze with bold black hand-painted mushroom cluster design. Ribbed white base, marked “NEVCO JAPAN” in red on bottom. Good vintage condition: no chips/cracks; minor glaze wear/age spots. Likely 1960s-1980s import. Nevco produced whimsical mid-century kitchenware/collectibles. Scarce design.