Final answer:
The statement that is not true of Japan is that Japan's consensus decision making system is very efficient and effective in the new speed-based economy. This system is often viewed as less efficient in the fast-paced modern economy.
Step-by-step explanation:
The statement that is not true of Japan is: D. Japan's consensus decision making system turns out to be very efficient and effective in the new speed-based economy. During the economic boom of the 1970s and 1980s, Japan was indeed a world leader in manufacturing and had a strong yen alongside a significant trade balance, as stated in A and B. However, in the context of the modern, fast-paced global economy, Japan's traditional consensus decision-making has been criticized for being less efficient due to its time-consuming nature, making statement D incorrect. Moreover, while Japan’s workforce was once seen as extremely dedicated, the rigid work culture has raised questions in terms of adaptability and innovation, as noted in statement C.