What is more interesting, and hard to really discuss if you are not familiar with the genre (which I was not and still am not) is why the song writers would use them and what they reference explicitly and implicitly and so on. I would love for anyone to tell me more about the song and its context!
Actually, thinking about music, or anything, like this is terrible. I read a book on Japanese architecture whose author (an awarded architecture professor from the US) I have forgotten which was basically listing as context-less observations everything she saw. For example "and this is a join typical of the suki-ya house, it's made by hand out of this wood and with these tools. Then it goes here. The suki-ya house has a table here used for writing. The walls are made with plaster over a bamboo mesh." etc. I learnt very little, although I knew a lot of factoids afterwards. But there are writers (like Marc Peter Keane ) who are much better, because they introduce everything with their meaning and where they stand in the tradition and mindset and history of the culture that produced it.
 e.g. http://www.amazon.com/Japanese-Garden-Design-Marc-Keane/dp/0... which is actually a nice very basic introduction to how Japanese history shaped its aesthetics.
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