Japanese tradition is all over the place in Japan from modern times to the era when the emperor use to rule making tea, getting married and praying to the gods are all Japanese tradition that is not seen much due the time and place that it is being performed. But one traditional that is seen and done every day is, bowing.

Bowing, two Japanese Men
This tradition is has been carried among the Japaneses for many years. It is a sign of respect towards one another as well those hold high ranks. Those who are or have lower status will bow more lower than those of a higher status. Also those who have lower status will tend to those of higher status need more so their own. This is usually done among co-workers.
Not only is this done in the business world, but all over the places in japan especially in schools. Students would bow to their teacher (sensei) when he enters the room to show respect.

Disclaimer: The a pictures are taken from the website below:
Business man bowing
Links to find out more about Japanese Traditions:
Japanese Customs and traditions
Japanese Culture: Traditions (English)
I think bowing (and body language in general) could be an interesting subject to discuss traditional Japanese culture. Where are your own original photos? If bowing is as prevalent as you say, why couldn’t you capture your own images? I’d like to read more of your own original thoughts. Your links are general – perhaps links dealing directly to bowing or Japanese gestures would be more useful.
The bowing usually happens when I do not have camera with me, usually when I meet new japanese students at Kansai, as well in bathroom with cleaning ladies are claning. Though yes, I would agree it would better to have my own pictures, but un fortunely, I do not have the camera during the days that it happens.