Tokyu Construction and Teijin Complete Successful Trial ofHydrogen Fuel Cell Generators to Supply Power atShibuya Construction SiteTokyo, Japan, August 9, 2023 --- Tokyu Construction Co., Ltd. and Teijin Limited
today announced completion of a trial of hydrogen fuel cell generators as power sources
at a construction site around Tokyo’s Shibuya Station.
The successful trial, which ran from late June to mid-July 2023, evaluated reductions ofnoise and carbon dioxide (CO2) emissions achieved by using hydrogen fuel cellgenerators instead of conventional gasoline generators. It revealed that the hydrogenfuel cell generators reduced noise from approximately 80 decibels to 60 decibels (*)
compared to gasoline generators. It also cut CO2 emissions approximately 6kg(reference range) in ten hours, or more than 1,000 kg per year.
(*) According to a study regarding "the Results of a Survey for Establishing Guidelines for NoiseLevels in cities and suburbs in Tokyo" by the Noise Research Subcommittee of the National
Environmental Research Council Japan, published in 2009 in the Journal of Environmental
Laboratories Association (Vol. 34, No. 4, pp. 254-261), the noise level inside a game arcade isapproximately 80 decibels, while the noise level inside a museum is approximately 60 decibels.
The measurement and evaluation methods used in the trial by Tokyu Construction and Teijin is
not the same as the one used by the National Environmental Research Council Japan.

In addition to testing noise and emissions, Tokyu Construction and Teijin verified theworkability and portability of the fuel cell and pressure vessel units. No special equipment
was required to load and unload the fuel cell and pressure vessel units onto a vehicle fortransport to the Shibuya construction office. In addition, one worker was able to carry theindividual units approximately 300 meters from the office to the construction site.

Hydrogen fuel cell generator
can be easily carried

Hydrogen fuel cell generator in use
as power source

The hydrogen fuel cell generators are comprised of a fuel cell unit, which features thenew IE-LIFTTM 1T fuel cell developed by British manufacturer Intelligent Energy Limited,and a companion pressure vessel unit, which supplies hydrogen fuel. This fuel, GreenHydrogen, is produced at Tokyu Construction's Technical Research Institute byelectrolyzing water using renewable energy. It does not emit CO2 during production, anddoes not emit gas or CO2 during combustion. The pressure vessel unit is a portablehydrogen fuel supply device equipped with three Ultressa® lightweight, corrosionresistant, composite pressure cylinders developed by Teijin Engineering Limited, asubsidiary of Teijin.
The generators were used at the construction site located in Shibuya’s west exit
basement underground taxi pool drive to supply electricity for lighting and warning signs
during nighttime construction work. They help avoid the issues caused by existinggasoline power generators, which can disturb local residents with unwanted noise, odors
and ground vibrations.
According to the construction operators, the fuel cell unit and companion pressure vessel
unit were excellent in portability at construction sites and that it can be carried safely. In
addition, the unit is very quiet compared to conventional gasoline generators so it can beused for construction work in residential areas. They were sure about the potential ofhydrogen energy in the midst of the demand for environmental measures at construction
sites.
Based on the trial results, Tokyu Construction and Teijin plan to deternine whether thefuel cell and pressure vessel units can be used in cold environments. Tokyu Construction
will promote the feasibility and benefits of using hydrogen fuel cell power generators atconstruction sites to reduce environmental impacts. Teijin aims to begin marketing thefuel cell and pressure vessel units to various industries, including building andconstruction, in the spring of 2024.
Hydrogen is featured prominently in the Green Growth Strategy, as an industry-wide
policy drafted by Ministry of Economy, Trade and Industry (METI) that seeks to realize
the target of carbon neutrality (net zero emissions) by 2050 stated by the Government ofJapan (GOJ).
About Intelligent EnergyIntelligent Energy is focused on the development and manufacture of its Proton
Exchange Membrane (PEM) fuel cell products for customers in the automotive,aerospace, generator, telecoms, materials handling and unmanned aerial vehicle (UAV)
sectors. The company is headquartered and manufactures in Loughborough in the UK,with additional offices and representation in the US, Japan, China and South Korea.
www.intelligent-energy.com
About Tokyu Construction
Since founded in 1959, as a member of the Tokyu Group pursuing a wide array ofbusinesses that serve everyday needs, Tokyu Construction has been committed toproviding residents with comfortable living environments that allow peach of mind.

About the Teijin Group
Teijin (TSE: 3401) is a technology-driven global group with two core businesses: highperformance materials and healthcare solutions. Established in 1918 as Japan’s firstrayon manufacturer, Teijin today comprises some 170 companies employing 20,000
people in 20 countries. Through “Human Chemistry, Human Solutions,” Teijin relentlessly
strives to aims to be a company that supports the society of the future by protecting theglobal environment and addressing the needs of people and communities. Teijin posted
consolidated sales of JPY 1,018.8 billion (USD 7.6 billion) and total assets of JPY 1,242.4billion (USD 9.2 billion) in the fiscal year ending March 31, 2023.
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