Matthias Voss


Matthias is Co-Managing Partner of Japan & South Korea and Managing Partner of Tokyo.

He is an energy and infrastructure expert who has been advising project sponsors, project companies and financiers across a wide range of industries on complex projects around the globe for nearly 30 years.

Matthias focuses in particular on energy transition and green energy projects, advising regularly on both project development (including joint venture formation, project structuring and development, commercial contracts and supply chain/procurement strategies) and related financings, particularly multi-sourced project financings involving multiple financiers such as ECAs, MLAs, DFIs and commercial banks.

In 2022, Matthias was shortlisted as a finalist for the FT Innovative Lawyers Award (Asia Pacific), in recognition of his strong advocacy and achievements in the energy transition field, including founding the firm’s Hydrogen Interest Group, actively publishing thought leadership across the industry, helping clients maximise return, mitigating risk and guiding and supporting them on their short and longer term decarbonisation strategies.

Currently based in Tokyo, Matthias has also practiced in the firm’s London, Shanghai, Beijing and Seoul offices. He speaks English, Mandarin, French, German and conversational Japanese.


Representative matters

An Asian utility major on its clean ammonia procurement at scale.

A global trading company on a sustainable aviation fuel project (including on the RED II/III and ReFuelEU Aviation initiative aspects).

The Japanese ECAs, mandated lead arrangers and the commercial banks on a USD1.4bn pre-export finance facility to CSN Mineração S.A, one of Brazil’s largest mining companies. The facility will primarily be used to finance the capital expenditure for the construction of a production plant for iron ore pellet feed, an essential raw material for low-carbon steelmaking by way of electric furnaces.

JERA on its USD200m investment in ReNew Power, one of India’s largest renewable energy companies. JERA agreed to acquire an equity stake of 10% in ReNew Power through subscription of newly issued shares in ReNew by a wholly-owned JERA subsidiary.

Published Work

  • Voss M (2022) “Global Hydrogen Review 2022” (link to publication), International Energy Agency
  • Voss M, Komachi H, Komachi (2022) “Ukraine War puts Japan’s clean energy transition at risk” (link to article), in Financial Times, May 2022
  • Voss M, Komachi H, Takahashi A (2021) “Japan’s NEDO to unlock the Green Innovation Fund for hydrogen investors” (link to article), Allen & Overy
  • Voss M, Neilson S, Komachi H (2021) “Japan's new energy strategy: Reflections on COP” (link to article), Allen & Overy

Speaking Engagements

  • Panel/Moderator, International Cooperation: The key to facilitate integrated hydrogen economy/Connecting Green Hydrogen Conference, October 2022 
  • Guest speaker, Catherine O’Connell’s Lawyer On Air Podcast Series “Creating a diverse, inclusive and equitable law firm in Tokyo with Matthias Voss”, August 2022
  • Speaker, A&O Ask the Experts - How to Make Hydrogen Projects a Success, Episode 3: “Lessons learnt from hydrogen projects in the Middle East and AsiaPac”, February 2022
  • Chair and Speaker, A&O Energy & Infrastructure Virtual Series 2021 “Session 7: Global Hydrogen Seminar”, December 2021
Matthias Voss exhibits excellent attention to detail. He has so much experience in the area in which we instruct him, and can identify and anticipate relevant issues.
Chamber Asia Pacific, 2024 (Japan – Projects & Energy, International Firms)
Matthias handles complex situations and negotiations very well to resolve the complexity of the dynamics.
Chambers Asia Pacific, 2024 (Korea – Project & Infrastructure, International Firms)


  • Leading Individual: Band 1 Lawyer – Projects & Energy, Japan (International Firms) 
    Chambers Asia Pacific 2024, 2023, 2022
  • Leading Individual: Gaiben – Banking & Finance, Japan (International Firms and Joint Ventures) 
    Legal 500 Asia Pacific 2024, 2023, 2022 
  • Leading Individual: Band 1 Lawyer - Projects & Infrastructure, South Korea (International Firms)
    Chambers Asia Pacific 2023, 2022
  • Leading Individual - Projects & Energy, South Korea (Foreign Firms) 
    Legal 500 Asia Pacific 2023, 2022 
  • Finalist: Most Innovative Legal Practitioner 
    FT Innovative Lawyers Awards Asia-Pacific 2022 



Registered Foreign Lawyer (England & Wales), Japan, 2013 (Tokyo Bar Association)

Admitted as solicitor, England and Wales, 1997


MA East Asian Studies Durham University, 1991

Postgraduate Diploma in Law Nottingham Trent University, 1993

Diploma in Legal Practice Nottingham Trent University, 1994

Admitted as solicitor in England and Wales, 1997


English, German
A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.