The ceremony was held at the Koa Sangyo Shipyard in Marugame City, Kagawa, Japan on the 22nd of December 2021. The vessel is named Asahi The brand new vessel is scheduled to start into service at Tokyo Bay as a bunker vessel in March 2022.

It’s powered by a huge lithium-ion battery provided through Corvus Energy and developed by the e5 Lab an organization by Japanese partners to develop infrastructure services for the shipping industry, specifically marine shipping. are focused on electrically powered vessels.

In particular, the tanker produces zero emissions of NOx, CO2 SOx, CO2, and particulates which reduces the environmental impact. Additionally, reduced sound and vibrations create an environment that is more relaxing for the workers and reduces noise pollution in the bay and around it.

World’s 1st zero-emission all-electric tanker
World’s 1st zero-emission all-electric tanker Credit: Asahi Tanker

In addition, the vessel will offer its battery power to emergency services in event of a natural disaster in Tokyo. This concept was first thought of in the form of e5 Lab and Asahi Tanker.

The layout of the vessel is supervised by Ichibansen Co., Ltd. Koa Sangyo and Imura Zosen KK are responsible for building one vessel and Kawasaki Heavy Industries (KHI) acts as the system integrator for the two. A second ship is expected to be finished in 2023 by Imura Shipbuilding in March 2023.


  • Dimensions: LOA 62m / Breadth 10.30m / Draft 4.15m
  • Ship classification society: Nippon Kaiji Kyokai (ClassNK)
  • Cargo: Heavy oil
  • Gross tonnage: 499 tons
  • Speed: About 10 knots
  • Cargo tank capacity: 1,280 cbm
  • Propulsion equipment: Azimuth thrusters 300kw x 2 Side thrusters 68kw x 2
  • Battery capacity: 3,480kWh

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