The poster of an event

Yesterday I  created this poster. What is actually demanded from a poster?

Yes, there were so many  ideas I had to resign from, due to whole wealth..to make apparent

the most important information.The most important thing whenever making anything, from making a poster

to writing a blog, is to stop and think if it is not against whole idea, even it's nice itself.

For instance, even if I had my own vision of hanami I would like to represent, I should rathar assume

how hanami is seen from peple's eyes here, and try to crate something approximate to fit.

to think about targetted people what they are fancy of or what can the most straightly attract them is

also important. All of these points are so natural, but I just wantted to make it clear for my future attempts.

A friend of mine has sugestted me that maybe I should emphasize the notable imformation..or use different font for some imforamations,

Yeah, that's right, I should work more on choosing apropriate font for any occations.