Record #00442Technology archive
Japan's Kashiwazaki-Kariwa nuclear station has seven units totalling 8,212 MW, the world's largest by installed site capacity.
Current Record
8212MW
Current record value
Located in Niigata Prefecture and operated by TEPCO, the station has five 1,100 MW reactors and two 1,356 MW advanced boiling-water reactors.
The units remained shut for years after Fukushima. Unit 6 returned to commercial operation on 16 April 2026; installed capacity does not mean all seven units are generating.
The record conclusion has sufficient verification support.
Basis: direct confirmation by an authority
TEPCO reports 8,212 MW as summed installed capacity of seven completed units, not currently operational output. Unit 6 resumed commercial operation on 16 April 2026; other units may remain shut. IAEA site data support capacity; the worldwide superlative is understood as site-level completed-unit nameplate capacity.
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