Aon Acquires Mitsubishi Chemical Group’s Insurance Arm
Deal News | Mar 04, 2025 | Re-Insurance News

Global insurance broker Aon has successfully completed its acquisition of Mitsubishi Chemical Group's (MCG) in-house insurance business in Japan as of March 1, 2025. This acquisition, operated under the brand Dia Rix, forms a part of MCG's internal service offering. Aon's move is strategically designed to bolster its Risk Capital and Human Capital capabilities within Japan, providing both corporate and personal line insurances to MCG's companies and employees. Following this transaction, Aon integrates 100 new employees from MCG, expanding its workforce in Japan to over 400 professionals. Led by Tatsuya Yamamoto, Aon aims to seamlessly integrate and modernize services reflecting the shifts in the Japanese non-life insurance market.
Sectors
- Insurance
- Business Services
Geography
- Japan – The acquisition took place in Japan, directly impacting the Japanese operations of both Aon and Mitsubishi Chemical Group.
Industry
- Insurance – The article describes the acquisition of an in-house insurance agency by Aon, a global insurance broker, emphasizing its strategy within the insurance sector.
- Business Services – The acquired entity operated as part of Dia Rix, an in-house business services provider for the Mitsubishi Chemical Group.
Financials
Participants
Name | Role | Type | Description |
---|---|---|---|
Aon | Bidding Company | Company | Global insurance and reinsurance broker acquiring Mitsubishi Chemical Group's in-house insurance business. |
Mitsubishi Chemical Group | Target Company | Company | Parent company of Dia Rix's in-house insurance agency, selling its insurance business. |
Dia Rix | Other | Company | In-house business services provider under Mitsubishi Chemical Group, which housed the insurance agency. |
Tatsuya Yamamoto | Person | People | Head of Japan at Aon, overseeing the integration and operations post-acquisition. |