20 Years of Litigation Experience | Licensed in Japan & California | Fellow of IAFL | Member of BHBA (Family Law & Trusts & Estates Sections)
Cross-Border Estate & Family Law Japan
Legal Profession Corporation CastGlobalToikyo Office 34F Atago Green Hills MORI Tower2-5-1 Atago, Minato-ku,
Tokyo、105-6234, Japan
Office Hours
9:30～17:30
on weekdays
050-3649-6002
This website provides information on cross-border inheritance and family matters involving Japan, particularly cases connected with the United States.
It is operated by a Japanese attorney who is also licensed in California and focuses on legal issues involving Japanese assets in international estates.
Assistance is provided to foreign heirs, executors, and attorneys dealing with Japanese bank accounts, real estate, and other property located in Japan.
We also handle complex and contested matters, including litigation and family court proceedings in Japan, where strategic legal judgment is required.
Practice Areas
We specialize in the following international legal matters involving Japanese jurisdictions:
1. International Inheritance & Probate
We assist foreign heirs, executors, and attorneys in handling Japanese assets, including bank accounts, real estate, and probate-related matters.
Cross-border inheritance involving Japan often presents practical challenges, particularly for clients residing abroad. We provide efficient, end-to-end support without the need to travel to Japan, including handling disputes when they arise.
2. Wealth Management & Private Client Services
We assist foreign heirs, executors, and attorneys in handling Japanese assets, including bank accounts, real estate, and probate-related matters.
Cross-border inheritance involving Japan often presents practical challenges, particularly for clients residing abroad. We provide efficient, end-to-end support without the need to travel to Japan, including handling disputes when they arise.
3. Matrimonial Finance & Property Division
We represent clients in international divorce matters involving Japan, particularly in cases with significant cross-border assets.
Our experience includes handling financial disputes, asset tracing, and the division of property across jurisdictions, including contested matters before Japanese courts.
4. International Adoption
We provide legal support for international adoption cases involving Japan, including complex situations requiring the application of foreign law.
These matters often involve sensitive legal and procedural issues, and we offer careful, case-specific guidance based on experience in both domestic and cross-border contexts.
5. Expert Legal Opinions
We provide legal support for international adoption cases involving Japan, including complex situations requiring the application of foreign law.
These matters often involve sensitive legal and procedural issues, and we offer careful, case-specific guidance based on experience in both domestic and cross-border contexts.
Legal Consultation
Online Strategy Sessions are available via Zoom and other secure platforms.
Topics
February, 2026
Attoreny Mizuuchi was interviewed by California attorney Mr. Alphonse Provinziano, esq as part of the Beverly Hills Bar Association(BHBA)’s International Family Law series. They discussed the differences between family law in Japan and California. The interview is scheduled to be released as a podcast later this year.
July 2024
Attorney Mizuuchi contributed an article on Japanese
family law to the July issue of the ABA (American
Bar Association) 's international law section’s
Newsletter.
The title is “Recognition of U.S. custody and visitation orders in Japan”.
May 2024
Attorney Mizuuchi contributed an article on Japanese
family law to the May issue of the ABA(American Bar Association) 's international law section’s Newsletter.
The title is “Japan Improves Enforcement of Hague
Return Orders and has a High Rate of Amicable
Settlement”.
May, 2022
Attorney Mizuuchi made an on-line presentation
regarding Japanese inheritance law in the Milan Bar
Association, Italy.
February, 2022
Attorney Mizuuchwas gave a lecture about
the legal practice under the Hague Child Abduction Convention in the on-line seminar held in the Aichi Bar
Association hosted by the Ministry of Foreign Affairs.
Key Features of the Office
１．Dual-Qualified Expertise (Japan & California)
Led by an attorney admitted in both Japan and California, we bridge the gap between Japanese and U.S. legal systems.
This allows us to communicate effectively with foreign lawyers and provide practical solutions in cross-border matters involving Japan.
２．20 Years of Litigation Experience in Tokyo
With over 20 years of experience in Japanese Family and District Courts, we are well-equipped to handle complex and contested matters.
This includes cases where disputes arise over inheritance, family issues, or the application of foreign law in Japan.
3. Global Professional Network (IAFL Fellow)
As a Fellow of the International Academy of Family Lawyers (IAFL) since 2018 and a member of the Beverly Hills Bar Association (BHBA), we are part of a trusted global network of leading family law practitioners.
Contact information
Please contact via e-mail.
050-3649-6002
Office hours 9:30～17:30 on weekdays
Contact us
Strategies for
International Divorce
More information
Representation in
Hague Convention
Cases
More information
Contact information
34F Atago Green Hills MORI Tower 2-5-1 Atago, Minato-ku, Tokyo 105-6234, Japan
電話: Tel 81＋(0)50-3649-6002
