Akiko Hirai says the Hamaoka power station 3 km from her home evokes such dread of the crippled Fukushima plant that she would spend ¥500,000 installing solar panels if it helped make Japan nuclear-free.

"Who can really guarantee that they're 100 percent safe? I want nuclear plants to be halted if they're so frail," said the 53-year-old housewife, who has lived in Shizuoka Prefecture for more than 20 years. "It's not that I'm worried about myself, it's my daughter and other small children I'm concerned about."

Hirai helps illustrate Japan's growing antinuclear movement in the wake of the world's biggest nuclear accident since Chernobyl. That's creating an opportunity for makers of solar equipment such as Panasonic Corp. and Sharp Corp. to capitalize on orders that analysts estimate may exceed $100 billion over the next decade, bringing down costs for consumers.