Anything bad about Japan?

Several students have asked me if there was anything about Japan that I didn't like when I was there in September for my first visit. The honest answer is no; but, I was only there for a week. I'm sure that if my stay had been longer, some things would have gotten on my nerves...and maybe other things would have seemed bad or wrong to me in a deeper sense.

One thing that I can imagine being difficult for me (if I were in Japan for a longer perieod of time), is the lack of physical contact between people, especially friends and family. For me, hugging and kissing on the cheek are everyday ways to express friendship. I'm not sure, but I think that at times I might feel lonely and uncomfortable in Japan for this reason.