TOKYO — When Masayoshi Son, SoftBank’s chief executive, first visited the Silicon Valley fuel cell start-up Bloom Energy late last year, one word came to his mind: crazy. Add to Portfolio SOFTBANK Corporation Go to your Portfolio » But the fuel cell technology — which promised efficient, cleaner and increasingly inexpensive “energy in a box” — intrigued him. After several more visits, Mr. Son was convinced that Bloom’s sleek fuel cell servers were a perfect fit for Japan, energy-poor and made even more so by an almost complete shutdown of its nuclear energy program after the 2011 Fukushima disaster. Now, SoftBank, the $70 billion Japanese technology investment company that completed its...
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