The European Union (EU) and Japan have established a strong partnership in the energy and climate sectors, with a history of collaboration that has evolved into a comprehensive framework covering various key aspects. The two regions have jointly worked on renewable energy deployment, energy efficiency, and technological innovations such as hydrogen technologies and fuel cells. Recent agreements post the Ukraine crisis highlight the significance of their partnership in enhancing energy security and sustainability. Both the EU and Japan have set ambitious goals towards climate neutrality, focusing on increasing renewable energy shares in their energy mixes and promoting energy efficiency measures. The EU is diversifying its energy sources to reduce dependency on Russian gas, while Japan is also emphasizing renewable energy and LNG imports. Investments in infrastructure and the development of hydrogen technologies form common grounds for their future energy strategies. The EU's Hydrogen Strategy aims to boost the usage of renewable hydrogen electrolyzers by 2030, aligning with Japan's vision of establishing a 'hydrogen society' by 2050. The shared objectives in hydrogen development present opportunities for economic cooperation and research exchange. Moving forward, the EU and Japan can strengthen their collaboration in global energy and climate policies, energy efficiency, renewable energy, hydrogen technologies, and circular economy initiatives. By leveraging each other's expertise and experiences, both regions can advance towards a sustainable energy future and contribute to global decarbonisation efforts.