China vs Japan — National Debt

Same high debt, entirely different stage

Japan's gross general government debt is 262% of GDP; China's is 58.6% on the official measure but 112% on the IMF's augmented basis. Both are classed as high-debt countries, yet the path by which the debt accumulated and the stage of development each occupies are entirely different.

Japan's debt built up over thirty years following the asset bubble collapse of the 1990s. As the private sector deleveraged, the government filled the gap and held up aggregate demand. Being an already mature creditor nation — the world's largest holder of net external assets — is what made that debt bearable.

China's debt, by contrast, came out of investment expansion during a high-growth phase. Large-scale capital went into infrastructure and property development to sustain growth rates, and the financing accumulated on the balance sheets of local governments and their affiliated vehicles. Debt taken on while contracting and debt taken on while expanding follow different paths even at the same ratio.

The role property played in each country

Japan's experience in the 1990s became the standard case for how falling asset prices turn into a long stagnation. When collateral values collapsed, firms and households deleveraged simultaneously, and the sum of that behaviour destroyed demand. The rise in government debt was the response meant to offset that collapse.

China's property adjustment is frequently compared with this case, though with a difference. Capital controls and a state-owned banking system give China relatively more room to modulate the pace of adjustment as a matter of policy. On the other hand, local government finance has leaned heavily on revenue from selling land-use rights, so a property slowdown feeds directly into weaker local revenue.

In Japan, then, falling asset prices propagated through private balance sheets; in China the same shock is transmitted straight into public finances through the local revenue channel. That is why, reading the debt indicators, Japan calls for attention to the transfer from private to public, and China to a change in the revenue structure inside government itself.

An asymmetry in statistical transparency

Japan publishes gross and net debt, central and general government alike, which makes cross-checking against international standards straightforward. The figure of 262% may be uncomfortable, but the path to it is in the open.

China is different. Official government debt is published, but the full extent of quasi-government borrowing, LGFVs included, rests on estimation. Even the IMF's augmented 112% is an estimate, and results vary by institution. That uncertainty is itself part of the risk.

This is why the comparison page cites both the "official" and the "augmented" figures for China. Picking only one misleads the reader either way: official alone understates, augmented alone presents an estimate as settled fact.

Demography, the variable both share

Japan and China have different debt structures but share one variable: a shrinking working-age population alongside a growing elderly one. Japan began that transition thirty years earlier; China has entered the same stretch only recently.

Demography works on debt indicators from two directions. On the spending side, pensions and healthcare grow and the fiscal burden rises. On the revenue side, the taxpaying population shrinks and the revenue base thins. It also presses down on growth, the denominator of the debt ratio. Because all three channels push the same way, the effects compound.

Seen this way, Japan's 262% is closer to the outcome of a country that has already passed through the demographic transition, while China's current figure is measured at the entrance to that same transition. Read the two purely as a same-moment comparison and this lag disappears.

The order to read this table in

First, check which basis is in use — official or augmented for China, gross or net for Japan. Depending on the combination, the impression ranges from "China 58.6% vs Japan 262%" all the way to "China 112% vs Japan 155%."

Second, distinguish debt accumulated during contraction from debt accumulated during expansion. Third, allowing for the difference in statistical transparency, read China's figure as a range and Japan's as a value. Fourth, check for both countries how demographics bear on long-run public finances.