Musashi Seimitsu is transitioning from a traditional auto parts maker to a key supplier of hybrid supercapacitors (HSCs) for AI data centers, with management planning to scale manufacturing from 200,000 cells in 2024 to 6.5 million by 2026. The company has partnered with Flex to bring the first capacitor-based energy storage systems to market, positioning Musashi Seimitsu's HSCs as a potential reference design for hyperscalers. The post expresses a strong bullish sentiment, noting that the author is increasing their holdings in Musashi Seimitsu and Flex while contrasting them against competitors like Navitas and Infineon.