Sidley, an international law firm advising insurers and financial institutions on regulatory and transactional matters, has reported on a proposed regulatory development in Japan concerning the supervision of reinsurance arrangements.
Sidley notes that Japanese insurers have materially increased their use of reinsurance in recent years, particularly ahead of the introduction of Japan’s economic value-based solvency framework (J-ICS / ESR), which came into effect on 31 March 2026.
The firm reports that, in 2024, asset-intensive block life reinsurance transactions involving Japanese cedants were estimated at between USD $20 billion and US$30 billion.
According to market analysis referenced by Sidley, as much as 30% of Japan’s life insurance liabilities may be capable of being addressed through asset-intensive reinsurance over time, depending on prevailing market conditions.
Sidley explains that, in light of this trend, the Japan Financial Services Agency (JFSA) issued a proposed amendment on 8 April 2026 to its Comprehensive Supervisory Guideline for Insurance Companies (Hokengaisha mukeno sougoutekina kantokushishin). Sidley describes this framework as guidance used by JFSA supervisors when conducting inspections and oversight of insurers and insurance intermediaries in Japan, setting out supervisory principles, operational expectations and assessment criteria.
The firm reports that the proposed amendment is aimed at strengthening supervisory expectations in relation to reinsurance, with a particular focus on ensuring that risk transfer is substantive rather than merely contractual, especially in relation to asset-intensive structures.
Sidley highlights that under the proposal, the question of whether a ceding insurer may avoid holding policy reserves for ceded liabilities would no longer be assessed solely by reference to contractual wording. Instead, Sidley explains that the JFSA would be expected to assess whether genuine risk transfer has occurred, considering the overall economic substance of the arrangement, the contractual structure, and which party ultimately bears the insurance risk.
The firm further notes that the assessment would include consideration of whether risk could effectively return to the ceding insurer through mechanisms such as recapture at the reinsurer’s discretion, as well as whether the arrangement primarily serves a financing function, such as supporting new business strain, rather than achieving genuine transfer of policy risk.
In addition, Sidley reports that the proposed amendment introduces enhanced supervisory expectations around risk management, particularly for asset-intensive reinsurance transactions. Sidley highlights that this includes greater scrutiny of reinsurer counterparty credit risk, asset management practices, internal risk frameworks, collateral arrangements and concentration exposures.
Sidley also notes that the JFSA is expected to place increased emphasis on stress testing, including scenarios involving reinsurer insolvency or recapture events, alongside strengthened governance and internal controls governing reinsurance decisions and more detailed assessment of reinsurer financial strength.
The firm states that the consultation period for the proposed amendment remains open until 11 May 2026, with further industry submissions expected from ceding insurers and other market participants. Sidley reports that the JFSA is targeting finalisation of the amendments in the third quarter of 2026, with implementation to follow once procedural steps are completed.
Sidley confirms that it will continue to monitor developments and review consultation feedback as the proposed changes progress through the regulatory process.
