Nishiyama

"Because of the earthquake and tsunami and water, there are going to be cases where some devices don't work when they receive electricity," said Hidehiko Nishiyama, a senior official at Japan's nuclear-power regulator.

At Plant, Repair Is Painstaking Task Peter Landers 2011

Nishiyama says the electrical wiring has failed on the motor of the pump that circulates water in the pool for the used fuel rods.

Efforts Continue to Cool Crippled Japanese Nuclear Reactors 2011

-Takashi Mochizuki and George Nishiyama contributed to this article.

R&I Lowers Japan Sovereign Debt Rating William Sposato 2011

While nuclear experts have been saying for days that Japan was underplaying the crisis' severity, Hidehiko Nishiyama of the nuclear safety agency said the rating was raised when officials realized that at least 3 percent of the fuel in three of the complex's reactors had been severely damaged.

Japan Admits Disasters Overwhelmed Government 2011

Write to Takashi Nakamichi at takashi.nakamichi@dowjones.com and George Nishiyama at george.nishiyama@dowjones.com

Japan Current Account Contracts; Machinery Orders Fall Takashi Nakamichi 2011

Write to George Nishiyama at george.nishiyama@dowjones.com

Tokyo's Move to Raise Tax Hits Snag George Nishiyama 2011

"I don't expect any evacuation order to expand to the Tokyo area," said agency spokesman Hidehiko Nishiyama.

Ruling Party Hurt in Japan Election Toko Sekiguchi 2011

"I don't expect any evacuation order to expand to the Tokyo area," Mr. Nishiyama added.

Japan: No Plans to Expand Evacuation Zone Megumi Fujikawa 2011

Write to George Nishiyama at george.nishiyama@dowjones.com and Takashi Nakamichi at takashi.nakamichi@dowjones.com

In Japan, Comments Stir Currency Cauldron George Nishiyama 2012

White smoke continued to rise from the buildings of two of the most troubled reactors, No. 2 and No. 3, said Hidehiko Nishiyama, an official with Japan's Nuclear and Industrial Safety Agency.

Efforts to Restore Power at Plant Continue Mitsuru Obe 2011