Unpredictability Threatens Australia’s Most Vital Asian Capital Partnership

When almost 400 Australian business executives and government officials met their Japanese counterparts at the Australia-Japan Business Co-operation Committee (AJBCC) conference in Chiba recently, the mood was celebratory. Treasurer Jim Chalmers’ attendance was a welcome signal, yet it highlighted a sober reality – 17 years had elapsed since an Australian Treasurer last made a dedicated bilateral visit to Japan.

According to the Japan-Australia Investment Report 2025, published by HSF Kramer and the Australian National University, total Japanese direct investment in Australia has reached a record AUD159.5 billion. Cross-border corporate integration is accelerating with Japanese & activity reaching a record 77 transactions and 53 partnerships.

As such, Japan is now Australia’s second-largest source of foreign direct investment, underpinning sectors from energy and critical minerals to real estate, off-site prefabricated housing, financial services, data infrastructure, and renewable grid transition.

The relationship between our two countries has matured into a “quasi-alliance”, a term Japanese Prime Minister Sanae Takaichi uses to describe how it has expanded with defence cooperation and coordination through the Quadrilateral Security Dialogue (Quad) reflecting deep regional strategic alignment.

However, a worrying trend has emerged between Australia’s global rhetoric and its domestic policy execution. Abroad, Australian leaders market our nation as a sanctuary of regulatory predictability and rule-of-law stability. At home, ever changing state and federal policy settings have introduced a palpable sovereign risk premium.

For example, the 2022 decision of then Palaszczuk Queensland government to impose a 40 per cent coal royalty tier increase, without any warning or consultation, was damaging to Japanese joint-venture equity partners who had co-funded development of regional assets over decades.

There is also ongoing debate at a federal level around retrospective gas reservation mandates, thereby threatening to alter return profiles after investors assumed significant early-stage development risk. Confusing and convoluted planning and environmental approval processes also conflict with corporate investment cycles built on multi-year consensus.

In Japanese corporate culture, strategy operates on generational horizons. Abrupt fiscal shifts severely test trust. As Ian Williams, the respected corporate advisor across both the Australian and Japanese community, said to me recently, “once the Japanese agree to a program, project and metrics, they think they are set. In Australia, we think they are flexible.”

Regulatory volatility is particularly detrimental to Australia’s housing and infrastructure needs.

The economic alignment is natural.

Japan faces demographic contraction, compelling its homebuilders and trading houses to deploy patient capital overseas. Australia faces rapid population expansion, a severe housing deficit, and a fragmented local construction sector.

Japanese capital is stepping directly into these structural voids through equity stakes in residential homebuilders, build-to-rent platforms, off-site modular manufacturing, regional workforce housing, and energy transmission. These deployments depend on disciplined, multi-year return profiles.

However, state-level policy shifts upend these models. Retrospective increases in foreign investor land tax surcharges and unannounced municipal planning changes undermine project economics mid-stream. Australian governments cannot encourage foreign capital to solve national housing shortages while simultaneously taxing that capital as a convenient

revenue source.

To secure long-term capital flows and deepen this strategic partnership, Australia must align its domestic regulatory settings with its foreign policy ambitions. Here are three ways to start this process:

1. Institutionalise CEO-level bilateral dialogue: Establishing a formal, annual CEO-level dialogue between leading Australian and Japanese corporate leaders would create a direct feedback channel to executive government, ensuring policymakers in both countries consult key capital providers prior to altering tax or regulatory settings.

2. Co-Invest in strategic national priorities: Bilateral cooperation must expand beyond hard commodities into strategic technology and energy infrastructure – specifically joint ventures in artificial intelligence, data centre capacity, and clean energy transition – requiring Australian policy settings that encourage and unlock the capacity of our private sector to be able to negotiate and achieve successful bilateral commercial opportunities.

3. Adopt long-horizon planning methodologies: Australian authorities should examine and consider adopting long-range frameworks like the Tokyo Metropolitan Government's methodology: “forward-casting”; a non-partisan 50-year vision for infrastructure and housing, and “back-casting”; to determine the exact regulatory settings required today – in consultation with the public.

Japan remains Australia's most reliable economic partner. Thriving over the coming decades requires Australia to demonstrate the regulatory discipline and policy consistency that true partnership demands.

Jason de Sousa is Managing Partner of Ideia Partners and host of the podcast – the Jason de Sousa Show.