Nishimura & Asahi
Nishimura & Asahi is a major Japanese business law firm headquartered in Tokyo and operating across Japan and key international markets.
Last updated August 26, 2026
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Overview
Nishimura & Asahi is a leading Japanese business law firm headquartered in Tokyo. It is identified as one of Japan’s “Big Four” law firms and, according to the referenced January 2024 description, the largest of that group by number of lawyers. The firm advises Japanese and international companies, financial institutions, investors, public-sector bodies, and other organizations on complex domestic and cross-border legal matters. The firm’s modern form dates from 2007, when Nishimura & Partners acquired the International Division of Asahi Law Offices. That division traced its lineage to Asahi Koma Law Offices, which had itself resulted from the combination of the Masuda & Ejiri and Komatsu Koma firms. Nishimura & Partners had been established in 1966 and was already recognized as one of Japan’s major corporate law practices. The 2007 combination brought together Nishimura’s established Japanese platform and Asahi’s international practice, creating the organization now known as Nishimura & Asahi. Its work spans a broad range of business-law disciplines. Reported areas include antitrust and competition, banking and finance, capital markets, corporate transactions and mergers and acquisitions, dispute resolution, intellectual property, investment funds, labor and employment, private wealth, projects and energy, real estate and construction, restructuring and insolvency, risk management and investigations, tax, and technology, media and telecommunications. The firm also handles international trade and other cross-border matters. Legal directories cited in the reference material place it in top-tier or Band 1 categories across numerous practice areas, including banking and finance, capital markets, corporate and M&A, dispute resolution, international and cross-border work for Japanese firms, and international trade. Nishimura & Asahi serves clients from a wide range of industries. The referenced client list includes telecommunications companies, banks and securities firms, insurers, manufacturers, technology companies, media businesses, entertainment companies, real-estate and leisure operators, and other major enterprises. Named examples include América Móvil, Citibank, France Telecom, Fuji Fire and Marine Insurance, Johnny & Associates, KDDI, Microsoft, Mizuho Securities, Nippon Steel, NTT, Oriental Land, Tokyo Broadcasting System, and Universal Studios Japan. The presence of these clients illustrates the firm’s focus on large-scale transactions, regulated industries, disputes, investigations, and strategic cross-border work. The firm maintains a substantial Japanese network with offices in Tokyo, Fukuoka, Nagoya, Osaka, and Sapporo. Its international presence includes offices or locations in Bangkok, Brussels, Dubai, Düsseldorf, Frankfurt, Hanoi, Ho Chi Minh City, Hong Kong, Jakarta, Kuala Lumpur, Manila, New York, Shanghai, Singapore, Taipei, and Yangon. Nishimura & Asahi is also a member of Lex Mundi, an international network of independent law firms, which supports coordination with counsel in jurisdictions where the firm does not itself maintain an office. As a professional-services brand, Nishimura & Asahi does not sell conventional consumer products. Its principal offerings are legal advice, representation, transaction support, regulatory analysis, dispute services, and strategic risk-management counsel. In October 2023, the firm updated its logo, marking a visible brand-identity change while retaining the Nishimura & Asahi name. Its positioning combines Japanese market depth, full-service corporate-law capability, and international reach for clients operating across borders.
History
Nishimura & Asahi’s institutional history combines the development of Nishimura & Partners with the international-practice lineage of Asahi Law Offices. Nishimura & Partners was founded in 1966 and became one of the major Japanese firms serving corporations, financial institutions, and other sophisticated commercial clients. Its growth reflected the increasing importance of specialized business law in Japan, particularly in corporate transactions, finance, disputes, and regulatory matters. The Asahi side of the firm’s history developed through earlier combinations. Asahi Law Offices was associated with the former Asahi Koma Law Offices, which had been formed through the merger of the Masuda & Ejiri and Komatsu Koma law firms. Within Asahi, the International Division developed experience in matters involving overseas parties and cross-border transactions. This international capability became central to the firm’s later identity. In 2007, Nishimura & Partners acquired the International Division of Asahi Law Offices. The transaction created the current Nishimura & Asahi organization and combined a major Japanese domestic practice with an established international platform. The resulting firm was able to advise clients on Japanese law while also coordinating work involving multiple jurisdictions, a capability increasingly important to Japanese companies expanding abroad and foreign businesses entering Japan. Following the 2007 combination, Nishimura & Asahi developed a broad full-service practice. Its reported areas include antitrust and competition, banking and finance, capital markets, corporate and M&A, dispute resolution, intellectual property, investment funds, labor and employment, private wealth, projects and energy, real estate and construction, restructuring and insolvency, risk management and investigations, tax, and technology, media and telecommunications. International trade and cross-border work are also part of its service profile. The firm expanded its physical presence beyond Tokyo through offices in Fukuoka, Nagoya, Osaka, and Sapporo. It also established or maintained overseas locations across Asia, Europe, the Middle East, and North America, including Bangkok, Brussels, Dubai, Düsseldorf, Frankfurt, Hanoi, Ho Chi Minh City, Hong Kong, Jakarta, Kuala Lumpur, Manila, New York, Shanghai, Singapore, Taipei, and Yangon. Its membership in Lex Mundi provides an additional framework for international collaboration with independent firms in other jurisdictions. Nishimura & Asahi’s client base includes major companies and financial institutions in telecommunications, technology, manufacturing, insurance, banking, securities, media, entertainment, and other sectors. The firm has been recognized by legal directories for work in numerous high-value practice areas. The referenced January 2024 account describes it as the largest member of Japan’s “Big Four” law firms by lawyer headcount, although the available material does not provide a precise headcount. In October 2023, Nishimura & Asahi updated its logo. The change represented a contemporary brand-identity adjustment within an organization whose core name and business structure had developed from the 2007 combination. The firm remains an active professional-services organization focused on legal advice and representation for complex Japanese and international business matters.
- 2023
Logo update
[1]Nishimura & Asahi updates its logo in October as a visual identity refresh.
- 2007
Creation of the modern Nishimura & Asahi firm
[1]Nishimura & Partners acquires the International Division of Asahi Law Offices, combining the two organizations’ Japanese and international capabilities.
- 1966
Nishimura & Partners is founded
[1]Nishimura & Partners is established and later develops into one of Japan’s major business law firms.
Products and positioning
A full-service Japanese business law firm positioned around top-tier corporate, financial, regulatory, dispute, and cross-border capabilities, supported by offices throughout Japan and a broad international network.
Legal services
Corporate and M&A
Advice on corporate governance, strategic transactions, mergers, acquisitions, joint ventures, reorganizations, and other major business combinations. The practice supports Japanese and international clients through transaction structuring, due diligence, negotiations, approvals, execution, and post-closing matters.
Financial legal services
Banking, finance and capital markets
Legal support for lending, structured finance, project finance, securities offerings, financial regulation, investment products, and other capital-markets activities. The practice serves financial institutions, issuers, sponsors, investors, and corporate borrowers in Japanese and cross-border matters.
Legal services
Dispute resolution
Representation and strategic advice in commercial disputes, litigation, arbitration, investigations, and other contentious proceedings. The offering covers domestic Japanese matters as well as disputes involving multiple jurisdictions and complex corporate or regulatory issues.
Regulatory legal services
Antitrust and competition
Advice on competition-law compliance, merger control, investigations, cartel and conduct issues, and interactions with regulators. The practice is relevant to transactions, commercial arrangements, and enforcement matters affecting companies operating in Japan and internationally.
Projects and infrastructure legal services
Projects, energy, real estate and infrastructure
Counsel for infrastructure, energy, construction, property, and development projects. Services may involve project structuring, financing, procurement, regulatory approvals, construction arrangements, real-estate transactions, and dispute or restructuring support.
Technology and communications legal services
Technology, media and telecommunications
Legal advice for technology businesses, telecommunications operators, media companies, and digital or content-related activities. The practice addresses commercial arrangements, regulation, intellectual property, data and technology issues, investments, and disputes.
Brand decisions
2023
Visual identity refreshOtherBackground
The firm refreshed its public-facing visual identity while continuing to operate under the Nishimura & Asahi name.
Action taken
Nishimura & Asahi updated its logo in October 2023.
2007
Acquisition of Asahi Law Offices’ International DivisionM&ABackground
Nishimura & Partners and Asahi Law Offices brought together complementary Japanese and international legal capabilities.
Action taken
Nishimura & Partners acquired the International Division of Asahi Law Offices, producing the current Nishimura & Asahi organization.
Aftermath
The combination strengthened the firm’s full-service and cross-border platform and formed the basis of its subsequent international office network.
Recent events
- 2023
Nishimura & Asahi updates its logo[1]
Other
The firm introduced an updated logo in October 2023 as part of a visual identity refresh.
Sources2 sources
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