Official NY OCA attorney registration data · Updated 2026 Methodology Discipline records

Yoshinobu Koyama

Suspended

Yoshinobu Koyama is an attorney admitted to the New York State Bar in 2013, with a registered practice address in Tokyo 100-7036, New York. According to the New York Office of Court Administration, the current registration status on record is Suspended.

Registration number5117809
Bar statusSuspended
Year admitted2013
Judicial departmentDepartment 1
Law schoolDuke University School of Law
Practice cityTokyo 100-7036, NY
Firm / organizationNagashima Ohno & Tsunematsu
Office addressJP Tower, 2-7-2, Marunouchi, Chiyoda-ku, Tokyo 100-7036, NY
Phone81-3-6889-7203
Next registration dueJul 2027

About Nagashima Ohno & Tsunematsu

Nagashima Ohno & Tsunematsu is a law firm headquartered in Tokyo, Japan, formed on January 1, 2000 when two Japanese firms combined. It provides international and commercial legal services in Japan to domestic and foreign companies and organizations across many industry sectors. The firm reports several hundred lawyers, including lawyers qualified in jurisdictions outside Japan, who work in customized teams matched to each client matter.

Practice areas of Nagashima Ohno & Tsunematsu:

Corporate & M&A Banking & Finance Securities & Capital Markets Bankruptcy & Restructuring Commercial Litigation Arbitration & Mediation Intellectual Property Employment & Labor Real Estate White Collar & Investigations Energy & Infrastructure Entertainment & Media Antitrust & Competition Tax

These are the practice areas the organization describes on its website. They are not a statement about Yoshinobu Koyama’s own practice or any specialty certification.

View the Nagashima Ohno & Tsunematsu profile and its 30 registered attorneys →

Office location

Registered office address on file with the New York State Bar. Verify before visiting, as the address reflects the contact on record and may be a firm rather than a personal office.

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Bar status can change at any time. For the authoritative, real-time status of Yoshinobu Koyama, confirm directly through the official New York Attorney Search using the registration number above. This record is republished from public New York State data and is provided for reference only — it is not legal advice and not an endorsement.

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