Fairfax said Digit and IIFL Capital would retain their existing management teams while gaining access to IDBI Bank's customer base and distribution network.
The expansion is expected to support Awbury's growth in Japan's credit and financial risk market while broadening access to locally issued cover for corporates and financial institutions.
The insurer has also offered wider home cover in northern Western Australia and pledged A$20m (US$14m) for community resilience as it seeks ACCC approval.