Miho Niunoya

Atsumi & Sakai - Japan

Senior Partner


+81 3 5501 1163

Highly regarded

Women Leaders


Bar admissions:




Practice areas:

Project development
Project finance

Industry sectors:

Construction and materials
Government and public policy
Real estate
Social infrastructure

Miho Niunoya is a Senior Partner at Atsumi & Sakai; she has more than 20 years’ experience advising on PFI/PPP and construction projects in the infrastructure and energy sectors and is recognised by independent commentators as a leading practitioner in the fields. She has also been actively assuming public roles such as serving as a member of expert committees and audit committees of national and local government authorities.

Atsumi & Sakai actively promotes the involvement of female attorneys with over 20% of our partners being women. Our considerable efforts from an early stage to introduce and develop maternity leave and childcare leave, supporting systems to encourage women to return to work, as well as a policy to prevent sexual and power harassment, have led to the creation of a healthy workplace culture where employees can work with peace of mind regardless of gender.

Recognizing this, in 2015 the firm received the Family Friendly Award from the Daini Tokyo Bar Association and has been named as an Employer of Choice (one of Asia’s best law firms to work for) in Japan by Asian Legal Business (ALB) eight times. Furthermore, one of our female partners won the Woman Lawyer of the Year award from Asian Legal Business (ALB) in 2017. Ms. Miho Niunoya was recognized as one of Asia’s Top 15 Female Lawyers for 2021 in ALB’s award for her work and expertise.

  • Advising a trading house on development of Battery Energy Storage Systems (BESS), which is quite new in Japan
  • Advising a leading company in the areas or materials and renewables in Europe on development of hydropower projects in Japan
  • Advising Nagoya City on the tender process and drafting of agreements for a MICE (Meeting, Incentive Tour, Convention and Exhibition) PFI project with an estimated value of about 48.3 billion yen
  • Advised a Japanese ministry working with a consulting company on the investigation of renewable energy systems, dispute settlement systems, etc., aiming at the improvement of legal systems for further development of renewable energy in Japan

  • Banking and finance
  • Construction
  • Corporate and M&A
  • Dispute resolution
  • Investment funds

  • Energy
  • Infrastructure
  • Materials
  • Real estate

  • Tokyo Bar Association

  • Law degree from Hitotsubashi University (1991)
  • LL.M. from Northwestern University School of Law 1997