• Merchant Ship Business
  JMU constructs a wide variety of merchant vessels, including tankers, bulk carriers, containerships, LNG and LPG carriers, PCTCs, ferries, and offshore support vessels. 
• Naval Ship and Marine Business
  JMU repairs and converts naval, merchant, and specialist vessels at its facilities in Yokohama (Isogo and Tsurumi), Kure, Maizuru, and Innoshima. It has built many of the core ships for the Japan Maritime Self-Defense Force (JMSDF), such as helicopter destroyers, Aegis destroyers, icebreakers, and FRP minesweepers. JMU has also delivered a range of vessels to the Japan Coast Guard, including helicopter-carrier patrol ships and high-speed aluminium patrol boats. The company has a proven track record in advanced vessels for specialist applications, such as workboats, oceanographic research ships, cargo-passenger vessels, and icebreakers, leveraging naval shipbuilding technologies.
• Offshore and Engineering Business
  The Offshore and Engineering Division engineers, procures, constructs and modifies offshore structures, including FLNG facilities using IHI SPB Tank® technology and semi- submersible drilling rigs. JMU is also actively developing 
  energy-efficient solutions, such as electric propulsion vessels with contra-rotating propellers (CRP) and floating offshore wind farms.
• Ship Lifecycle Business
  JMU’s lifecycle services cover every phase of a vessel’s operation, from dry dock repairs and equipment inspections to global spare parts supply. The company also offers environmental upgrades, including ballast water management systems, low-sulphur fuel compliance, and emission reduction technologies. Advanced maintenance services support vessel longevity and enhance operational efficiency.

New construction decisions shape the performance, compliance and commercial value of a vessel for decades. Lloyd’s Register helps owners, operators, charterers and project teams make those decisions with greater clarity, combining trusted classification expertise with practical newbuild advisory support. 

Through LR’s New Construction Guide, clients can access independent shipyard intelligence across North Asia, including China, Korea and Japan. The guide helps compare shipyard capabilities, facilities, track record, vessel specialisms and future-fuel readiness, supporting smarter shipyard selection and earlier project planning.

Beyond the guide, LR provides advisory support across the full newbuild lifecycle. From technical specification development and design review to regulatory impact assessments, alternative fuel studies, energy efficiency, carbon capture readiness, site support and operational preparation, LR helps clients reduce uncertainty before it becomes a cost, a delay, or a risk. 

With global technical authority, local shipyard knowledge and deep maritime expertise, Lloyd’s Register supports future-ready vessels from the earliest concept through to construction and delivery, helping clients build with confidence in an increasingly complex market.