Vintage Japanese Ceramic Mugs Set of 3

〰️Vintage Japanese Ceramic Mugs Set of 3
〰️Ceramic - maybe porcelain?
〰️ Brown tan glaze with small brutalist style handles
〰️Bottom is hallmarked but cant find any info on brand / artist

Size-
5''x 3'' each

Condition:
Great vintage condition

As with all vintage items this item exhibits signs of age such as surface wear and weathering. As they are part of the description, please enlarge all photographs to better ascertain details and condition.