Japan nuclear plant shutdown adds new risk to economy, auto industry

The Hamaoka plant, located about 200 km (120 miles) southwest of Tokyo, accounts for about 15 percent of its electricity output. Chubu in turn provides power to half of the 18 plants that make Toyota's vehicles in Japan, and all four of Suzuki Motor Corp's domestic car and motorcycle factories.

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Toyota, Suzuki and other car makers said they had no comment on how they would cope before Chubu Electric explains how it plans to make up for the power shortfall.

Replacing nuclear power with that produced by conventional thermal plants could increase electricity costs, but those make up only a small portion of automakers' costs, argues Nomura Securities auto analyst Masataka Kunugimoto.

What matters more, analysts say, is doubts about reliability of power supplies that could give automakers another reason -- in addition to a strong yen and cheaper labour abroad-- to shrink production volumes in Japan.

"This raises a question of how you're going to split your domestic and overseas production," said Koji Endo, senior analyst at Advanced Research Japan.

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