The present report was introduced the Fukushima Hydrogen Filling Technology Research Center, as a NEDO project. The hydrogen metering accuracy inspection method using the master meter method for hydrogen dispensers and the hydrogen large flow rate test facility that was established at AIST for the purpose of uncertainty reduction were also introduced. These facilities to establish hydrogen refueling technology and metering system technology would be utilized for the widespread use of fuel cell commercial vehicles.

The Overhead hydrogen piping is installed in the sky using a stainless-steel flexible tube with a small diameter. It is a hydrogen pipeline that takes advantage of the characteristics of hydrogen and takes safety into consideration, just like an electric wire.

In order to socially implement hydrogen fuel cell ships. it is necessary to establish hydrogen fuel supply infrastructure for bunkering, develop energy management and hull structure and conduct demonstration operations. We will introduce an overview of these and hydrogen fuel cell ships currently under construction.

Ammonia fuel is attracting attention as an alternative fuel for reducing greenhouse gas (GHG) emissions in the marine industry because it does not emit carbon dioxide (CO₂), as global efforts to prevent global warming are underway. IHI Power Systems is researching the use of ammonia as a fuel for marine engine and is developing a four-stroke ammonia fueled engine for marine use that uses ammonia gas as the main fuel and ignites with a small amount of diesel fuel. A full-scale test engine and operating facilities were installed at our factory, and performance verification tests were conducted. As a result, stable operation at an ammonia fuel share ratio of over 90% was successfully achieved. In addition, by using an exhaust after-treatment system, the engine achieved 0 ppm ammonia and less than 15 ppm N₂O generated by ammonia combustion at the end of the operation facility. This paper describes the concept of the four - stroke ammonia fueled engine, the test facility, and the test results.

Japanese Government has revised the Basic Hydrogen Strategy in June 2023. One of the objectives is to make clear the pathways for Japan to develop a hydrogen society under the “S+3E” principles. The revised strategy sets out the key supply and demand targets and anticipated production and procurement means and use-cases that both public and private sectors are encouraged to invest and foster. The strategy also describes the main points of the proposed producer support and cluster development support schemes that would assist realizing large-scale, resilient supply chains. The hydrogen safety strategy, including potential refinement of the existing laws and regulations based on scientific evidence, as well as the hydrogen industry strategy, which focuses on the promising industry areas where Japanese cutting-edge technologies have strength, are also discussed. These strategies have the common goals that Japan and Japanese industries lead the development of global hydrogen market and the introduction of hydrogen at a large scale.