I got comment to request that needs to translate "RYU"used as school name.
So I show you the one of answers.
The literal translation of "RYU" is drive(or flux // onmarch // river // slobbery stain // stream // streaming motion // tide // trend)
The word of "RYU" used as school name is a clipped form of "RYUHA".
If there are some Kanji you want to know, Please let me know.
I will show you it by priority.