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Rankings published in 2026
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Tier 1
Tier 2
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Tier 1
Tier 2
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Tier 1
Tier 2
Tier 3
Tier 4
Notable
Linked Reviews
Financial and corporate
Mayer Brown is a large international law firm with offices in 27 cities across the Americas, Asia, Europe and the Middle East. The firm’s office in Tokyo is relatively new having been set up in March 2018.
Focusses / specialisms
The firm’s core focus is on project finance and project development, where it acts for Japanese clients in international infrastructure projects in the energy, natural resources, chemical and transport sectors.
Its corporate team advises on outbound M&A and disposals of overseas business for its Japanese clients. It also does capital markets work in investment funds, where it advises sponsors in fund investments.
Key clients
Key clients of the firm include NEC Corporation, Mitsubishi Corporation, Itochu Corporation, MUFG Bank, Chubu, NTT, Sumitomo and Sumitomo Chemical.
Research period review: 33rd edition (2022/2023)
During the research period, the firm was particularly active in the project space and corporate M&A practice.
In corporate M&A, the firm kept busy advising on outbound M&A and disposals of overseas business for Japanese corporate and financial institutions. Most recently, the firm has been assisting clients in work relating to the energy transition space and energy storage sector. Active industry sectors include social infrastructure, coal-fired power, oil and gas, and renewable energy
