Do you have any ideas that you'd like to add to the Japanese system?
「日本に取り入れてほしいと思う制度はありますか?」は、
Do you have any ideas that you'd like to add to the Japanese system?
が伝わりやすいと思います。
Do you have any ~? 何か~はありますか?
ideas that you'd like to add to the Japanese system 日本の制度に取り入れてほしい発想