Welcome to the Holytown Antiques Community
A place for antique lovers, collectors, dealers and enthusiasts to share knowledge, ask questions and discover more about antiques and collectables.
Whether you need help identifying an item, want to research a maker or mark, discuss antique furniture and collectables, share a restoration project or simply chat with others who share your interest, our community is open to everyone.
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To identify whether a piece of glass is Japanese, here are some key indicators to look for:
1. Labels and Markings
Many Japanese glass pieces, especially from the mid-20th century, were labeled. Look for:
- “Made in Japan” or “Japan” labels.
- Specific brand labels like:
- Iwatsu Glass – often labeled “Best Art Glass, Foreign” or “Hineri”.
- Sanyu Glass – labels may read “Fantasy Glass” or “Registered, Sanyu, Made in Japan”
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2. Style and Color
Japanese art glass from the 1950s–1970s often features:
- Bright, swirling colors (e.g., pink, blue, yellow, green).
- Handkerchief-style vases or abstract shapes.
- A style that can resemble Murano or Czech glass, but with subtle differences in finish and form.
3. Craftsmanship
- Japanese glass often has a high-quality finish but may include small imperfections or bubbles, especially in older pieces.
- The glass may feel slightly lighter than European counterparts.
4. Manufacturer Clues
Some known Japanese glassmakers include:
- Iwatsu Glass Co. (Osaka)
- Sanyu Glass Co. (Osaka)
- Narumi (sometimes associated with Sanyu)
5. Compare with Online Galleries
Websites like 20th Century Glass have galleries and identification guides that can help you visually compare your piece
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