Great business and symbolic significance will be attached to the visit of Japan’s Crown Prince Naruhito, the heir to the Chrysanthemum Throne, when he arrives in Cambodia next Thursday, June 27. This is the first such visit to Cambodia for the heir apparent to the oldest continuing hereditary monarchy in the world and probably the first visit by a member of Japan’s royal family.
Dr Hajime Fujiwara, a geologist, former Texas oil man and author of 50 books, told me about Crown Prince Naruhito’s visit. He says Crown Prince Naruhito is very interested in water resources and the environment, not only for Japan, but for the whole world. Fujiwara says the Japanese people were touched by outpourings of support from the Cambodian people following the the Tohoku earthquake and tsunami on March 11, 2011, which caused the horrific Fukushima Daiichi nuclear disaster, the effects of which will be with us for generations.[...]
These gestures from Cambodia, traditionally the recipient of aid from Japan, resonated with the Japanese people. The Cambodian people told the Japanese people to please use the aid money Cambodia would have gotten for their own people who were suffering as a result of the disaster. The magnificence of this gesture is why Japan’s Crown Prince Naruhito is coming next week. [...]
Japan reopened its embassy in Phnom Penh in 1992. Through entities like JICA, the Asian Development Bank, other development organisations and private companies, Japan has been steadily involved in Cambodia’s reconstruction.
Japan provides funding for the Khmer Rouge trials, restoration works at Bayon Temple and many other projects helpful to Cambodians.
A picture and a video is to be found 
Well, there seems, in fact, to be a general rule of junior members seeing off senior members. (And, of course, the crown prince is a senior member in relation to Prince and Princess Akishino as this is not so much about age but about rank.) 
