Japan has recently made a major stride in the field of green fuel engines with Toyota's groundbreaking innovation surpassing the conventional hydrogen and methanol engines. Toyota's hydrogen engine, first introduced with the Corolla Concept, has revolutionized zero-emission mobility by delivering the performance of a gasoline engine without corresponding emissions. This move is part of Toyota's broader strategy towards environmental preservation and providing eco-friendly vehicles as an alternative to battery electric vehicles (BEVs). The hydrogen engine showcases impressive performance metrics, including 114 horsepower, 140 Newton meters of torque, and a remarkable thermal efficiency of 44%, outperforming traditional gasoline engines in fuel economy and emissions reduction. Furthermore, the design of Toyota's hydrogen engine simplifies fueling systems, making it lighter and more adaptable to various climates and terrains. Additionally, the engine can generate electricity for vehicle accessories, highlighting its versatility and efficiency. This development emphasizes Japan's commitment to technological innovation in the automobile industry and its pursuit of alternative fuels to achieve carbon neutrality. The competition in the green fuel engine sector from countries like China and Malaysia, with initiatives such as ammonia industry for zero-emission boats, underlines the global effort to diversify energy sources and address environmental challenges in transportation.