The Japanese shipping industry is gearing up for a transition towards using methanol as a marine fuel in a bid to reduce greenhouse gas emissions from the global maritime sector. By 2027, Japan is expected to see a surge in the launch of methanol-fuelled vessels, with the International Maritime Organization (IMO) targeting net zero emissions in international waters by 2050. A report by Japanese classification society ClassNK indicates a rise in methanol-powered vessels, projecting a demand for 4.5 million tons per year by 2026. Methanol-fuelled ships can refuel at major ports globally, with a recent study in Yokohama focusing on methanol and green methanol bunkering. Japanese companies are investing in e-methanol production projects to ensure a cleaner fuel supply. Despite the efficiency of methanol in reducing greenhouse gas emissions, it is considered a temporary solution. The push for cleaner marine fuels like ammonia and hydrogen is gaining traction in Japan, with the Ministry of Land, Infrastructure, Transport and Tourism offering financial support for their development. The aim is to achieve the utilization of cleaner vessels by around 2030. Additionally, Japanese firms are enhancing their involvement in methanol projects, including the development of methanol-fuelled ships and investment in e-methanol production both domestically and abroad. While methanol is seen as a transitional fuel due to its emission reduction potential, Japan's focus remains on advancing towards zero-emission fuels like ammonia and hydrogen to meet long-term sustainability goals.