For decades, Japan’s cheap currency helped fuel investments around the world. But the story has turned: the yen is creating new risks for US debt, global markets and Donald Trump. Business Beyond takes a closer look. Chapters: 00:00 Introduction 02:04 The secret behind Japan's cheap money 05:31 Why America needs Japan 10:20 How the US intervened 12:39 The danger of a stronger yen 14:28 The Yen trap 16:14 Conclusion 17:46 Credits 18:03.