Without doing your work for you...
1. Poem... no offense, but if you don't know this one, you're going to have a hell of a hard time with rest.
3. Isolated them from basically the rest of the world for hundreds of years (see: Tokugawa Era)
4. Arts were more valued than business. Merchants were the on the bottom of the totem pole. They were viewed as "merely pushing other peoples work". (again, see Tokugawa Era)
That'll get you started.