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NAPA, ClassNK and Marubeni to collaborate on fleet-wide study of EEXI and CII’s effect on operations

NAPA and ClassNK will work together with Marubeni to evaluate potential fuel savings achievable through voyage optimization, and compare adaptation strategies

Helsinki, Finland and Tokyo, Japan – April 11, 2022: NAPA, the leading maritime software, services, and data analysis provider, will work with leading class society ClassNK and Japanese general trading company Marubeni to assess what fuel and carbon emission savings could be achieved through voyage optimization.

NAPA will use its Fleet Intelligence platform to retrospectively analyze the impact of EEXI using the actual vessel performance across Marubeni’s fleet and compare it against similar fleets. ClassNK will provide its expertise in verification, analysis and accuracy. Based on this, NAPA will predict how well the Marubeni vessels will be able to perform in the future with reduced propulsion power and remain competitive in the market from 2023 onwards when new EEXI and CII requirements enter into force.

The cloud-based NAPA Fleet Intelligence platform combines NAPA’s expertise in naval architecture with many years of data on actual sailed voyages and weather conditions, using NAPA’s unique performance model to generate insights. With no need for commissioning or hardware installation onboard vessels, the platform can easily analyze past performance and optimize fleet operations.

This will enable NAPA, ClassNK and Marubeni to analyze the effect of EEXI requirements on Marubeni’s fleet in terms of transportation capacity, CO2 emissions and fuel consumption. NAPA will also calculate Carbon Intensity Indicators (CII) for vessels using historical operation data and predict how much performance can be improved with the state-of-the-art weather routing system, NAPA Voyage Optimization.

Mr. Naoki Mizutani, Managing Director at NAPA Japan, said: “Reducing emissions is a strategic priority for fleets around the world, and with so many options on the table, it makes sense to start by finding out what is achievable by just optimizing voyages, without the immediate need for any new fuels or technology. As future fuels are likely to be expensive, fleets should be looking at how they can reduce fuel use in the first instance by operating more efficiently. However, given the multiple commercial incentives at play, this is no easy task, not to mention factoring in weather and ship-specific requirements. Investing in rigorous analysis at the outset will help Marubeni chart their course through the huge number of decisions that will be required to reduce emissions and remain competitive in the long term.”

Mr. Takayuki Hase, General Manager of Ship Department at Marubeni, said: “It is a very exciting opportunity for Marubeni to collaborate with NAPA and ClassNK on this joint study that will help reduce CO2 emissions and fuel consumption. We hope that this joint study will make a contribution to improving the maritime industry’s carbon footprint through digital solutions for shipping operations.”

Mr. Yoshimichi Sasaki, General Manager of Digital Transformation Center at ClassNK, said: “Given that actual vessel performance will play a more pivotal role in shipping operations, ClassNK is very glad to be involved in this project. I hope that the initiative among three parties will be able to propose a model to utilize the actual vessel performance and extend its implementation in the maritime industry, leading to a low carbon world.”

NAPA Voyage Optimization on NAPA Fleet Intelligence

Picture: NAPA Voyage Optimization on NAPA Fleet Intelligence

About ClassNK
Established in 1899, ClassNK is a classification society dedicated to safety and environmental protection through third-party certification. ClassNK has conducted diverse technical services including surveys and classifications of ships and marine structures based on its own rules, international conventions on behalf of more than 100 flag states, management system certifications in line with ISO and other industry standards. ClassNK has committed to provide the industry with its full support to pave the way for digitalization and decarbonization challenges through the expanding certification service and R&D with industry partners.

For more information, visit

About Marubeni
Marubeni Corporation and its consolidated subsidiaries use their broad business networks, both within Japan and overseas, to conduct importing and exporting (including third country trading), as well as domestic business, encompassing a diverse range of business activities across wide-ranging fields including lifestyle, ICT & Logistics, food, agri business, forest products, chemicals, metals & mineral resources, energy, power business, infrastructure project, aerospace & ship, finance, leasing & real estate business, construction, industrial machinery & mobility, and next generation business development. Additionally, the Marubeni Group offers a variety of services, makes internal and external investments, and is involved in resource development throughout all of the above industries.

For more information, visit 

About NAPA
In its over 30 years of operation, NAPA has become a global leader in developing and scaling software, services and data analysis for a safer, smarter, and more sustainable maritime industry.

NAPA operates globally, with 190 employees in eleven countries in Europe, Asia and the Americas, and has a turnover of more than €23.8m. To date, NAPA has 420 user organizations for its design solutions, nearly 3,000 installations onboard vessels, and a growing number of subscribers for its cloud-based fleet services.

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Media enquiries :

Peter Jackson
BLUE Communications
T: +44 7757 393786

ClassNK, Public Relations Team
Telephone: +81 (3) 5226 2047



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