The company behind NanoEFX
NanoEFX was invented in Japan by Chie Yasunaga, founder of EiShin Co., Ltd., and is manufactured there by EiShin. ECO EFX Solutions GmbH in Hamburg is the German company responsible for its international commercialisation. We aim to help combustion engines run cleaner — with documented fuel results that vary by engine and duty cycle, and without engine modifications.
| 2009 | Founded in Japan as EiShin Co., Ltd. Prototype development begins the following year with an engineering doctor from Osaka University. |
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| 2016 | Listed in 2016 on the platform now called UNIDO's Sustainable Technology Promotion Platform (STePP), under the Energy and Environment categories. |
| 2018 & 2021 | The eco-SPRAY | NanoEFX patent is registered in Japan, and subsequently in the United States. |
| 2022 | The first vessel study runs with Ishida Shipbuilding and Kyowa Industries. |
| 2023 | ECO EFX Solutions GmbH is founded in Hamburg/ Germany to develop the international market for NanoEFX [eco-SPRAY] |
| 2023 & 2024 | Independent academic work: a fuel-consumption study at the National Institute of Technology (KOSEN), Hiroshima, and a diesel study by Prof. Toshifumi Chaen at the Hiroshima National College of Maritime Technology. |
The full record, including the parts that did not lead anywhere, is on our story.
Our story
How NanoEFX began in Japan and grew into an international air-filter treatment — our mission and the milestones along the way.
Read our story →Team
The founders and specialists behind NanoEFX, across Japan, Europe and Africa.
Meet the team →Partners & UNIDO
International use, the UNIDO database listing, and the ECO EFX Solutions Group of regional companies.
See partners & UNIDO listing →Governance
Leadership and advisory board, quality, compliance and product safety, ethics and whistleblowing.
See our governance →Procurement
Supplier details, product data, safety data sheets, insurance and quality, and how a pilot, ordering and supply work.
See supplier information →Become a distributor
We are looking for distributors, exclusive distributors and sales partners to take NanoEFX to fleet operators in their country or region.
Apply as a partner →The uncomfortable parts are published too
Fuel-saving products have a credibility problem, and it is largely self-inflicted: selected best cases, percentages without a method, and no trial that ever came up weak. We decided to run the opposite way. Everything below is on this site, with the numbers.
We publish the trial with the weakest result
Across eleven telecom tower generator sites in Nigeria, running continuously at near-zero load, the operator’s data shows a median of +1.7% and two sites that got worse — too small to establish a clear effect for that duty cycle. It has its own page, with the same detail as the favourable trials — because a product that works everywhere is not a believable product.
We name the figures we withdrew
A NOx claim we could not trace to any measurement was removed from this site in August 2026. Two results at one Japanese operator were traced to an implausible baseline and excluded — while staying visible in the table, so you can check the reasoning.
We show the limits next to the number
Our best-documented trial reports a 17.7% reduction — and, on the same page, that the vehicles also ran with 8.7% lower utilisation during the trial period. We found that in the operator's own records and published it rather than leaving it out.
The full evidence section → · all 386 individual measurements, including the 300 we cannot verify