Hario has been dedicated to the design, production, and sale of heatproof glass since it was founded in 1921. Hario are the only heatproof glass manufacturer in Japan to have a factory.
Hario began as a manufacturer of laboratory glassware. In 1948, they expanded their production to household items, starting with the coffee syphon. Hario also began producing lenses for automotive headlights in 1980. Today, Hario continue to make a variety of items, from microwave-safe kitchenware and coffee and tea implements, to aromatherapy and pet products.