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OOYOO develops gas separation technologies for industrial and environmental applications.
Founded in 2020 and based in Kyoto, OOYOO develops and sells technologies for separating and purifying air and other gases. Its work includes filters for masks, air enrichment, and carbon dioxide separation membranes. The company was founded by Shivaniya Ethan. In October 2025, it raised JPY 300 million in seed funding from Mitsubishi UFJ Capital, Kyoto Capital Partners, Chushin Venture Capital, Mizuho Capital, and Future Creation Capital.
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