Since Obisbo, Inc. conducts much business in Japan, it is likely to have cash flows in yen

Question:

Since Obisbo, Inc. conducts much business in Japan, it is likely to have cash flows in yen that will periodically be remitted by its Japanese subsidiary to the U.S. parent. What are the limitations of hedging these remittances one year in advance over each of the next 20 years? What are the limitations of creating a hedge today that will hedge these remittances over each of the next 20 years?