Japan's economic development has always been a research hotspot in the academic community. Japan experienced a huge trade deficit in 2022, and in the four years before 2022, Japan's import and export fluctuations were very balanced and structurally stable. Based on the fact that Japan will experience a huge trade deficit in 2022, this paper analyzes the relationship and current situation of innovation and trade in Japan with existing theories and data. As an old developed country, Japan is hardly affected by the local competition brought by the trade impact on its local innovation at the present stage. Moreover, the independent research and development of its advantageous industries led by enterprises makes its advantageous industries more competitive in the trade market and obtain more export opportunities. More export opportunities promote innovation in large Japanese companies and create a virtuous cycle of innovation and exports in Japan.