Case Details

Hiroshi Osumi v. Swiss Confederation (ICSID Case No. ARB/26/1)

Subject of Dispute:

Debt Instruments
Economic Sector:

Finance
Instrument(s) Invoked:

JSFTEPA (Agreement on Free Trade and Economic Partnership between Japan and the Swiss Confederation)
Applicable Rules:

ICSID Convention - Arbitration Rules

(a) Original Proceeding

Claimant(s)/Nationality(ies):

Hiroshi Osumi (Japanese)
Respondent(s):

Swiss Confederation (Swiss)
Date Registered:

January 7, 2026

Party Representatives

Claimant(s):

Mori Hamada & Matsumoto, Tokyo, Japan
Respondent(s):

State Secretariat for Economic Affairs SECO, Bern, Switzerland
LKK Arbitration Ltd, Geneva, Switzerland
Status of Proceeding:

Pending
Latest Development:

March 31, 2026 - Following appointment by the Respondent, Gabriel Bottini (Argentine/Spanish) accepts his appointment as arbitrator.

No References Available.

(a) Original Proceeding

Date	Development
January 7, 2026	The Secretary-General registers a request for the institution of arbitration proceedings.
February 24, 2026	Following appointment by the Claimant, Peter Turner (British/French) accepts his appointment as arbitrator.
March 31, 2026	Following appointment by the Respondent, Gabriel Bottini (Argentine/Spanish) accepts his appointment as arbitrator.