Japanese nursery

My husband absolutely loves Japanese culture.

He’s almost fluent in Japanese, and his life goal is to move to Japan and naturalize.

I want to surprise him with a Japanese themed nursery for our baby girl but I’m stuck.

I know I want to do a wall decal of a Japanese cherry tree, like this

And I’m going to make a crane mobile like this (but all white)

But after that I’m stuck..... I don’t want to do too much but I also want others to be able to tell what the theme is.

Is ideas?