The CBS drama “NCIS,” now in its 11th season, reigns supreme in the weekly Nielsen TV ratings (football excluded) and has fans at the highest level of the sea service. It’s launched one successful spinoff and has plans for a second. Thanks to reruns on cable, the Mark Harmon-led procedural is rapidly becoming this generation’s “MASH” when it comes to the most likely show to pop up when you turn on your television. But there has to be a limit. And the folks at Fox Japan are testing it. From Dec. 29 to Jan. 8, the network will air 234…