Japan being an islands nation, energy security has been a major concern since it was first felt in early 1970s and second after the Fukushima nuclear disaster in 2011. The country is dependent on the import of energy that constitutes 89% of total energy consumption. As of FY 2021, about 36.3% of its total energy consumption is dependent on the crude oil that comes from the Gulf countries. The seaborne transportation of this crude oil has to pass the Strait of Hormuz, Indian Ocean, Malacca Strait, and South China Sea, which remain critical especially when it comes to guarding this critical asset through these long sea lanes. Meanwhile, India, being a key strategic partner of Japan in the Indian Ocean Region (IOR) plays a crucial role in securing this seaborne transport for safe passage of Japanese crude oil. Japan is also engaging with India in its nascent Asia-Africa Growth Corridor (AAGC) since 2017 in securing this sea lane and the overall growth of Asia and Africa. However, in the South China Sea, Chinese active interference becoming a hurdle, since China is also having problems with the territorial claims of Senkaku/Diaoyudao Islands ever since they found the reservoir of natural gas in the islands in 1972. To that end, Japan’s Free and Open Indo-Pacific (FOIP) vision along with other like-minded countries tries to resolve the existing challenge that comes directly from China. Thus, this paper tries to highlight the various challenges that Japan is facing with its energy security, particularly those relating to the Indo-Pacific region.