In April, the Japan International Cooperation Agency committed up to $1.5 billion to LEAP 2, an infrastructure fund the Asian Development Bank manages on behalf of multiple donors. JICA could have lent that money to Vietnam or the Philippines directly, the way Japan has for decades. It chose instead to route the capital through a shared vehicle with shared oversight. That choice, repeated across dozens of smaller deals every year, is the actual architecture of who finances Asia — a layered system of overlapping banks, not the two-block "China versus everyone else" picture that shows up in most headlines.
The Asian Development Bank remains the largest dedicated infrastructure lender in the region and estimates the continent needs $26 trillion in infrastructure investment through 2030 — power grids, ports, rail, water and climate-resilient construction that no single institution can fund alone. The AIIB, founded in 2015 as Beijing's answer to that gap, has become the World Bank's largest co-financing partner rather than its rival, with 56 jointly funded projects worth $13.6 billion as of last August. JICA and its sister agency JBIC bring Japan's capital and, increasingly, route it through ADB and AIIB vehicles rather than purely bilateral loans.
The real map of who finances Asia isn't two competing blocs. It's a lattice of banks that lend to each other's projects as often as they compete for them.
China occupies a different part of the map. The China Development Bank and the Export-Import Bank of China remain the two largest sources of Chinese overseas lending, and both operate mostly bilaterally — a loan from Beijing to Colombo, or Beijing to Nairobi, without the co-financing layers that define ADB and AIIB deals. That structure gives Chinese lenders speed and fewer conditions attached, which is precisely what has made Chinese finance attractive for ports and rail projects that multilateral banks, with their environmental and governance reviews, take years to approve. It also concentrates risk and leverage in a single lender, the trade-off borrowing governments accept for faster money.
Who actually finances what tends to sort by sector as much as by geopolitics. Ports and rail skew toward bilateral Chinese lending and Japanese engineering contracts. Power generation splits between multilateral banks, which increasingly require renewable components, and Chinese state banks, which will still finance coal where multilateral lenders won't. Climate and digital infrastructure — the categories every institution now claims as a priority — are where the overlap is thickest, with ADB, AIIB, JICA and the World Bank frequently appearing on the same project as different tranches of the same loan.
None of the players in this system are neutral, and all of them describe their lending as responsible development finance rather than strategic competition. The more accurate description is somewhere in between: a set of institutions that compete for influence in the same countries while increasingly needing each other's balance sheets to fund projects at the scale Asia's infrastructure gap actually requires.