Traditionally, the Japanese tea ceremony and the sharing of tea enhances a meal or finishes a festive gathering. The photo shows a tea ceremony at a Nichiren temple in Kamakura, Kanagawa.
Japanese green teas are processed in a different way to Chinese green teas. They are steamed, before being rolled and have a distinct grassy, delicate flavor.
For more information, have a look at this article on Japanese Tea and Tea Sets.