Flowers as a hobby
Japanese people love flowers. Japanese language is very rich in vocabulary related to flowers and they have many hobbies like ikebana (flower arrangement) dedicated to the world of flowers. There are many parks and gardens that have sections exclusively dedicated to flower cultivation. Last week I went to one of the largest ones in Tokyo, I was expecting to find many old people but I found people of all ages.
There were species from all around the world and even some Japanese varieties that have been developed in labs. Some people were carrying huge cameras, others were just taking pictures with their cellphones, and some flower geeks were even writing down every detail observed on their notebook.