In what ways did justinian influence rome, europe, japan, and the state of louisiana when he compiled what became known as the justinian code?

Justinian influence Rome, Europe, Japan, and the state of Louisiana when complied what became know as Justinian code because he simplified the voluminous roman legal materials and codified Roman law into form used in both the east and the west.
He passed down the legal traditions off Europe, Japan and the state of Louisiana.
Justinian Code or formally known as Corpus Juris Civilis it the gathering of laws and legal interpretation developed under the Byzatine emperor Justinian.

Where are the following ?