The chief operating officer, who joined from Etiqa in 2019, takes charge on 1 October after running the insurer's bancassurance and financial adviser channels.
Formerly of Tokio Marine, Hata leads the renamed EMIS Insurance Services, which offers personal lines cover to group employees and affiliated companies and risk consulting to corporate clients.
Domestic systemically important insurers would need larger boards, while insurers with less retail reach or lower systemic importance would face fewer approvals.
The funds will be disbursed in two IDR10trn (US$557m) instalments, as the insurer seeks to address a cash flow gap between contributions collected and healthcare service payments.