Japan's hydrogen strategy has undergone strategic realignment to emphasize green hydrogen and address energy security concerns. The country's vision includes a 'Safety + 3E' framework focusing on safety, energy security, economic efficiency, and environmental sustainability, with a significant public-private investment plan of JPY15 trillion. While Japan aims to use hydrogen across various sectors, challenges like high costs, import dependence, and uncertain demand outlook persist. The nation is actively seeking international partnerships for hydrogen supply, particularly from Australia, the Middle East, and the United States. To facilitate market integration, Japan initiated a trial for a hydrogen trading platform in partnership with the Tokyo Commodity Exchange. Strategic lessons include the need for precision in sectoral focus, strategic procurement through long-term contracts with diverse suppliers, and the development of a mature hydrogen market infrastructure. By addressing these challenges and leveraging strategic partnerships, Japan aims to solidify its position in the global hydrogen economy.