Best Lawyers in Japan for Corporate and Mergers and Acquisitions Law
May Sakai is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law. May, who practices law in Tokyo, Japan, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which May is held by other top lawyers in the same geographic and legal practice area.
Takuya Fujino is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law. Takuya, who practices law in Osaka, Japan, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Takuya is held by other top lawyers in the same geographic and legal practice area.
Ning Ning is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law. Ning, who practices law in Tokyo, Japan, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ning is held by other top lawyers in the same geographic and legal practice area.
Hiromasa Ogawa is a top attorney recognized by Best Lawyers in the practice area(s) of Banking and Finance Law and Corporate and Mergers and Acquisitions Law. Hiromasa, who practices law in Osaka, Japan, has been recognized since 2027. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Hiromasa is held by other top lawyers in the same geographic and legal practice area.
Sayako Tsukamoto is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law and Labor and Employment Law. Sayako, who practices law in Tokyo, Japan, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sayako is held by other top lawyers in the same geographic and legal practice area.
Kentaro Sadahiro is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law and Personal Injury and Civil Litigation. Kentaro, who practices law in Tokyo, Japan, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kentaro is held by other top lawyers in the same geographic and legal practice area.
Tatsuya Hasegawa is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law. Tatsuya, who practices law in Tokyo, Japan, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Tatsuya is held by other top lawyers in the same geographic and legal practice area.
Yutaka Takiguchi is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law. Yutaka, who practices law in Tokyo, Japan, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Yutaka is held by other top lawyers in the same geographic and legal practice area.
Kazuo Katayama is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law and Tax Law. Kazuo, who practices law in Tokyo, Japan, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kazuo is held by other top lawyers in the same geographic and legal practice area.
Jun represents Japanese and overseas clients, including manufacturing companies, banks, and start-ups. His practice area focuses on international transactions, M&A, data privacy law, labor & employment. Based on his study in the U.S. and training at two different U.S. law firms, he provides legal support to Japanese companies expanding into overseas markets as well as to foreign companies expanding into the Japanese market. He also provides a wide range of legal services, including M&...
Yo Kashibuchi is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law. Yo, who practices law in Tokyo, Japan, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Yo is held by other top lawyers in the same geographic and legal practice area.
Takahiko Tani is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law and Financial Institution Regulatory Law. Takahiko, who practices law in Tokyo, Japan, has been recognized since 2027. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Takahiko is held by other top lawyers in the same geographic and legal practice area.
Ayaka Itoh is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law. Ayaka, who practices law in Tokyo, Japan, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ayaka is held by other top lawyers in the same geographic and legal practice area.
Takayuki Aonuma is a top attorney recognized by Best Lawyers in the practice area(s) of Antitrust / Competition Law and Corporate and Mergers and Acquisitions Law. Takayuki, who practices law in Tokyo, Japan, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Takayuki is held by other top lawyers in the same geographic and legal practice area.
Takashi Oguchi is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law. Takashi, who practices law in Osaka, Japan, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Takashi is held by other top lawyers in the same geographic and legal practice area.
Our Methodology
Recognition by Best Lawyers is based entirely on peer review. Our methodology is designed to capture, as accurately as possible, the consensus opinion of leading lawyers about the professional abilities of their colleagues within the same geographical area and legal practice area.
The Process
Best Lawyers employs a sophisticated, conscientious, rational, and transparent survey process designed to elicit meaningful and substantive evaluations of the quality of legal services. Our belief has always been that the quality of a peer review survey is directly related to the quality of the voters.