HARIO is the only heatproof glass manufacturer in Japan with their own factory. We have been manufacturing and selling heatproof glass since its very inception, starting with laboratory glassware.
In 1948, HARIO expanded production to household items, starting with the coffee siphon. HARIO also began producing lenses for automotive headlights in 1980.
Today, HARIO continues to produce a wide variety of items from microwave-safe kitchenware to coffee and tea accessories, including the world-renowned V60 coffee brewer.