Japan
Japan's slice of the world's 85.85 ZFLOP/s of installed computing power — its datacenter silicon apportioned from published AI-compute shares, its personal silicon from population and device intensity, and both marked to the daily headline. Per person it holds 2.1x the world average.
Neighbours by rank
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#3 · India → 5.52 ZFLOP/s
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#5 · Indonesia → 2.21 ZFLOP/s
Two keys, blended by their real weight in the headline. About 37% of the world's compute is datacenter and industrial silicon, which is extraordinarily concentrated and apportioned from published AI-compute shares. The other 63% is personal — phones, gaming GPUs, PCs, consoles — which follows people, apportioned by population weighted for device intensity. Japan comes out at 3.10% of the world total, or 2.66 zettaFLOP/s.
Note: this is an apportionment, not a measurement. Nobody publishes a per-country census of installed FLOP/s, and this is the most approximate part of the site. See the methodology for both keys and the assumptions behind them.