29th October 2019
Tokyo Kisen
e5 Lab“e5 Tug” – electric tug powered by battery and hydrogen fuel cellTokyo Kisen Co., Ltd. and e5 Lab Inc. have jointly developed the new concept design of “e5Tug,” electric propulsion harbor tugboat powered by large-capacity battery and a hydrogenfuel cell.
The e5 Tug is a harbor tug fully electrified and designed to minimize environmental
footprint.
The e5 Tug is equipped with a propulsion system running on “e5 powertrain platform”,devised and planned by e5 Lab, which utilizes a large-capacity battery system as a main
power source and a hydrogen fuel cell and generator as the auxiliary power source.
This electric propulsion system will ensure sufficient bollard pull and continuous cruisingtime necessary for harbor tugboat which requires a large-capacity power to function.
Furthermore, CO2 emission is minimized by incorporating fuel cell.
This joint project is drawing upon knowledge and experience of Tokyo Kisen as a tugboat
operator and e5 Lab is undertaking concept planning / development, design, and project
management.
We will proceed with the project by seeking advice from the Ministry of Land,Infrastructure, Transport and Tourism, ClassNK, and others for the regulatory compliance.
After the final investment decision we aim to launch the tug for commercial operations at
Yokohama Port and Kawasaki Port in 2022.

【e5 Tug outline】
Type of vessel
Operating area
Propulsion
Towing power
Service speed

Harbor tugboat
Yokohama Port / Kawasaki Port2 x 1500kW azimuth thruster
50 tons
14 knots【Main features of e5 Tug】
Environmentalperformance

It reduces CO2 emissions in all operational phases such as push
/ pull, transit and standby (it can also be reduced on the basisof Well-to-Propeller measure).

Contribution at thetime of disasters

It has a function of power supply from ship to shore in theevent of a disaster and can be used as an emergency powersource.

Future scalability

Fully electrified powertrains can adopt the most suitableenergy sources (lithium-ion battery, hydrogen fuel cell, allsolid-state battery, LNG generators, etc.) in accordance withtechnological progress.
In the future, it will be possible to achieve zero emissions on
Well-to-Propeller basis in combination with renewable energy.

【Li-ion Battery + Hydrogen FC pure electric power train for e5 Tug】

【Outline of each company】
Tokyo Kisen Co., Ltd. (Head office: Yokohama) is a major tugboat company in Japan with its
mission of supporting maritime safety. Since the founding in 1947, the company has been
consistently engaged in the operations of assisting navigational safety of ships throughout
Tokyo Bay, the center of Japanese marine transportation, and one of the busiest sea traffic
areas in the world.
Tokyo Kisen is operating harbor tugs, escort tugs, pilot boats and CTVs for offshore windfarms. In addition, its group companies operate transfer boats, water busses, harbor cruise
ships and car ferries. In 2013, the company launched a (non-battery type) hybrid tug.
Website: www.tokyokisen.co.jp
e5 Lab Inc. (Head office: Tokyo) is a shipping solution provider based on the electrificationand digitization of ships. With the mission of “Sustainable domestic shipping, which is thelifeline of Japan”, we will create new added value by combining the latest technology andideas, and solve the problems of domestic shipping, thereby ensuring safe navigation ofships. We aim to contribute to society by protecting the global environment. Currently, weare proceeding with a project aimed at completing an electric propulsion Tanker “EVTanker” of Asahi Tanker Co., Ltd. in 2021.
Five values provided by e5 Lab: electrification, environment, efficiency, economics, evolution

Website: http://e5ship.com
e5 project promotion video:
https://youtu.be/6sJjzCbRFWw【Contact】
e5 Lab Inc. etug@e5ship.com