Recently, manga, Japanese comic, is widely well-known. Did you happen to know a manga titled "Cha no Namia" (written and illustrated by Kaeru Minamo) featuring on Japanese tea?
The story includes tea cultivars, tea culture, and the custom of traditional Japanese industry. Also, the current situation where tea farmers and tea shop keepers are facing also depicts vividly. So, we can learn "tea" while enjoying the book, which is good.
Some volumes can be seen through the Yahoo Japan site.
But only Japanese. Sorry!!