How clean is the grid behind Rakuten?

Rakuten runs on Japan's grid, which was 477 gCO₂/kWh and 33% clean in 2025 (Ember).

Mapped (unverified)

Rakuten

Tokyo, Japan

Rakuten is a mapped data center in Tokyo, Japan. It runs on Japan's grid, which was 67% fossil-fuelled at 477 gCO₂e/kWh in 2025 (Ember).

Reporting by Eric Keller · Updated Jun 14, 2026

Real parent

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Operator

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Grid carbon

477 gCO₂/kWh

Clean electricity

33%

Attribution & capacity confidence:mediumprimary source

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Most sites are mapped — located but awaiting a second source. How we verify

Dot size = disclosed capacity (MW). Smallest = undisclosed, not small.

data center

Grid carbon intensity

477 gCO₂/kWh

Clean electricity

33%

Fossil electricity

67%

National grid context, not this facility's own metering. Full country picture: Japan data centers.