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Observatoire des Actions de Groupe

Aya Ohsawa

Professor of Civil and Consumer Law, Faculty of Law, HOSEI University (Tokyo, Japan).

Born in 1977. Ph.D. in Law from Tokyo University in 2007. 

Specialist in consumer law and French-Japanese contract law.


Ohsawa, AyaAction collective pour la protection des consommateurs au Japon [PDF]


On 8 June 2022, 14 months after the claims were heard, the Competition Appeal Tribunal decided to grant a Collective Proceedings Order (CPO) to …

British Collective actions in the FX cartel case: The Competition Appeal Tribunal “opts-in”   In 2019, two competing opt-out claims were brought …

On 11 May 2022, the Paris Court of Justice (Tribunal Judiciaire) ruled against the group action brought by the association RESIST against …