By Phred Dvorak The panel of four Japanese seismologists debating whether there's an active fault under the Oi nuclear plant failed to reach an agreement Wednesday, leading the government to push for more surveys to settle the matter. More may be at stake than the fate of the Oi plant. Many of Japan's nuclear plants are located in seismically active areas, and the government has indicated it's time for a review of earthquake guidelines for reactors. How the panel, and Japan's new nuclear regulator, will handle the examination of the Oi fault could signal how tough the government is likely to be in its checks of other reactors as well. On Wednesday, Nuclear Regulation Authority commissioner Kunihiko Shimazaki called for more digging and data-collecting around the fault, until the panelists have enough evidence to come to the same conclusion. Now, one panelist, Toyo University's Mitsuhisa Watanabe, says he believes the fault is active and the reactors should be shut down immediately while more studies are done. But other panelists say they're still not sure. Add a Comment About Japan Real Time Japan Real Time is a newsy, concise guide to what works, what doesn't and why in the one-time poster child for Asian development, as it struggles to keep pace with faster-growing neighbors while competing with Europe for Michelin-rated restaurants. Drawing on the expertise of The Wall Street Journal and Dow Jones Newswires, the site provides an inside track on business, politics and lifestyle in Japan as it comes to