[samurai007]

Himeji is between Osaka and Hiroshima, not Kyoto, so it's best to see that when you are heading to or from Hiroshima. And Nikko is 2 hours northeast of Tokyo, and looking at my map, I think you'd have to head most of the way to Tokyo before you could get a train line heading to Nikko. Nikko is best done as a day trip from Tokyo. Also, I think you'll want at least 2 days in Nagasaki, and 1 in Fukuoka, for 3 days on Kyushu. Cut back 1 day from either Tokyo, Nagano, or Kyoto. For the 2 days in Hiroshima, spend 1 in the city itself, and the other on Miyajima Island, off the coast. You might also consider seeing Takayama and Kamikochi instead of/in addition to Nagano... not sure what you want to see in Nagano, the Olympic village?