Private wealth: Independent local firms in Japan

Mori Hamada & Matsumoto

Combining tax, wealth management and litigation expertise, Mori Hamada & Matsumoto’s private wealth practice provides a full service to clients and is particularly strong in the areas of M&A, corporate reorganizations, and cross-border transactions, acting for high-net-worth individuals, families and private companies. The firm handles significant tax disputes between taxpayers and tax authorities in Japan, utilising its MHM Tax Advisory Service, which is staffed by lawyers, tax accountants, and certified public accountants. Atsushi Oishi focuses on tax, estate planning and M&A transactions for wealthy individuals and companies that are substantially owned by specific families. He co-leads the team with Makoto Sakai, whose expertise covers private wealth management, tax and M&A. Also notable in the area is Hiroshi Oyama.

Practice head(s):

Atsushi Oishi; Makoto Sakai

Other key lawyers:

Hiroshi Oyama


‘They have top level expertise in taxation and trust businesses. I also feel that they provide appropriate advice on cross-border matters, the latest schemes and other ambiguous matters where opinions have not yet been established.’

‘There is no other law firm that has a one-stop service with such a high level of knowledge in family governance and in-depth experience in trust law, corporate law, civil law, tax law and tax practice.’

‘The firm possess broad knowledge and provide excellent opinions on taxes and trust businesses in the areas of family governance and wealth management.’

‘Mori Hamada & Matsumoto is outstanding in the market compared to other law firms, and they are always very reliable.’

‘Mr. Oishi is an expert on family governance. Compared to others, his expertise in structuring schemes utilizing taxation, trusts are outstanding. Also, Mr. Oishi has extensive experience in cross-border matters, which enables him to provide valuable opinions that cannot be obtained elsewhere. We always consult with Mr. Oishi on cross-border projects when valuable and important clients are involved.’

‘Mr. Oyama has worked for the national tax authority and have the ability to provide accurate advice in taxation. His opinions on taxation are always precise and we have high confidence in his opinions. In many cases where we have to structure trust schemes, we often get opinions from Mr. Oyama. His knowledge of trust business is very advanced as well.’

Nagashima Ohno & Tsunematsu

Covering the spectrum of services in the area, Nagashima Ohno & Tsunematsu has particular strengths in structured finance and trusts, taxation, general corporate and M&A, as well as advising on domestic and cross-border issues. Masayuki Fukuda  is known for strength in trusts and inheritance work; he co-leads the team with expert in tax advice Yushi Hegawa . Another key name in the area is Yoshikazu Hasegawa , who has experience in Singapore matters.


‘Yoshikazu Hasegawa has an excellent reputation in the market.’

‘Very efficient; understands quickly international issues.’

‘Capable to grasp complex matters.’

‘This team works with Japanese clients in Singapore and the SE Asian region. They are trusted by individuals due to their ability to communicate in Japanese and understand the Japanese mindset.’

‘Yoshikazu Hasegawa has lived and worked in Singapore for many years and is keenly aware of both the Singapore legal market and the Japanese UHNW client requirement.’

Nishimura & Asahi

The Nishimura & Asahi private wealth practice brings together expertise in corporate governance, succession planning and inheritance, combining this with strength from within the firm in tax, insolvency and litigation. Cross-border expertise in another key feature of the practice, which advises high-net-worth individuals on a range of global assets and regulation. Wealth management and corporate specialist Yoshinobu Fujimoto focuses on business succession planning, inheritance issues and international taxation; he co-leads the team with Masaru Shibahara, who handles disputes in the area and advises across the spectrum of business succession matters, from M&A to the drafting of family charters.

City-Yuwa Partners

Specialising in domestic and international inheritance matters, City-Yuwa Partners handles a range of private wealth matter for high-net-worth clients, family business owners, company founders, investors, young entrepreneurs and financial institutions. The practice is supported by immigration and litigation expertise within the firm, as well as working closely with external tax accountants to provide a full service to clients. Shigeaki Itoh co-leads the team with counsel Hitomi Saka, who focuses on international inheritance, estate planning and labour and employment law.

Practice head(s):

Shigeaki Itoh; Hitomi Sakai


‘The team and particular attorney that I work with for our mutual clients are mostly international family between Japan and the US’.

‘The attorney has experience handling cross border estate planning capabilities. In addition, I thought it was great and efficient the team can take credit card payments and their upfront conflict of interest check was very quick and efficient’.