Toyo-Sasaki Glass (TSG) is the merger of two of Japan’s oldest and largest glassware manufacturing companies, together becoming the number one glassware manufacturer in Japan. A combination of traditional craftsmanship and material technologies has brought TSG’s HardStrong (HS) products to be used throughout Japan. The unique Ion Toughening Technology the HS brand is known for, creates a tempered layer making it 1.5 times safer, stronger, and more durable than conventional glassware. Their products have also been awarded numerous awards including the prestigious Good Design Award for several years.
