MaterialsGlass cloth, high-end substrates replace conventional productsGlass manufacturer AGC's glass-core substrates, seen here, resist warping at high temperatures and cut power consumption. (AGC)ANNA SATO, MANA KUBOTA and EMI OKADAApril 2, 2026 01:53 JSTOSAKA/TOKYO -- Japan's glass industry, long stuck in a stagnant domestic market, has found a bright spot in materials used in semiconductor devices for artificial intelligence, spurring aggressive investment.