Takata Corp is preparing to comply with a U.S. order to expand a region-specific recall nationwide, the Nikkei said on Tuesday, a move that's likely to add millions more to the tally of cars called back to replace potentially deadly air bags. The U.S. National Highway Traffic Safety Administration last week gave Takata, which supplies about a fifth of the world's air bags, until Tuesday to declare that its air bag inflators are defective and issue a national recall.