Almedio Inc. (7859.T) engages in the research, development, manufacture, and sale of test media, insulating materials, optical storage solutions, and nanomaterials in Japan and internationally. The company operates through Thermal Insulation Materials, Archive and Storage Solution, Industrial Solutions, Nanomaterials, and other segments; it provides refractory materials, thermal insulators, electronic parts sub-materials, long-term storage optical discs and drives for industrial and audio-visual equipment, test discs and inspection equipment for optical media, carbon nanofibers, synthetic graphene powder, and high-modulus polypropylene CNF pellets for aviation, automotive, medical, and sports applications; it also sells furnaces, high-temperature kiln tools, and measuring instruments for optical disc drives. Founded in 1981 and headquartered in Kunitachi-shi, Tokyo, Almedio maintains facilities in Higashimurayama and Fukushima, Japan, with subsidiaries ALCERA (Su Zhou) Co., Ltd. in China and ALMETEC Co., Ltd. in Japan focused on refractory and electronic materials production. In recent years, the company commenced research, development, production, and sales of nanomaterials in 2019, announced a 2025 medium-term management plan in May 2025, and continues to expand its archive and nano businesses amid niche market positioning.