In a demonstration of their commitment to hydrogen power, Toyota introduced a groundbreaking repressurization technology for liquid hydrogen fuel systems at the Eneos Super Taikyu Series. The GE Corolla H2 Concept, equipped with a hydrogen internal combustion engine fueled by liquid hydrogen, featured a system that could collect and repressurize hydrogen boil-off that is typically wasted during operations. This innovative system incorporates a self-pressurizer device that utilizes a miniature fuel cell stack to convert the boil-off gas into electricity, which in turn powers the liquid hydrogen pump for repressurization. The development by Toyota marks a significant advancement in energy efficiency, not only in racing powertrains but also potentially in various applications beyond the racing industry. While initially showcased in a racing context, the technology's adaptability for other uses, such as in Toyota's fuel cells for trucks, hints at a broader impact. By effectively handling the efficiency challenges associated with liquid hydrogen, this innovation opens doors for its increased utilization, driven by its higher energy density and extended range capabilities.