He promised himself he was going to make his mother proud. Not only that, but he would be her source of joy. The best is the only thing he wishes for her.
Leon: oh well, I'm going back to my island
Ren: save journey
Leon finally arrived in Asia only to find an even harder path ahead of him. He couldn't wait to receive help from Japan after the death of the Emperor's son, the best options would be to ask for help from Russia, India or China but those were fighting amongst themselves so that he couldn't do that either. In the end, Leon could only rely on himself.