The Japanese bow

I have a lot of questions about Japanese culture that I would like to explore over this next semester. One of them is the bow that Japanese people use to greet each other and say goodbye. To me this seems like a quintessential example of a cultural habit that might be in danger from the onslaughts of globalization, considering the dominance of other Western habits such as shaking or waving hands. Is there any sign of a disappearance of the bow in Japan? Are people increasingly shaking hands in Japan, or is the bow steadfastly thwarting globalization?