Question:
What future developments do you see for fuel cells?

I sense that the predictions for fuel cells are somewhat overoptimistic. As I said before, there are various issues to deal with, and they will not be solved immediately. The Agency of Natural Resources and Energy includes a group of which I am a member called the Society for Strategy in Fuel Cell Development. The group has proposed a goal for Japan of 50,000 fuel cell–based cars by 2010, 5,000,000 cars by 2020, 2,100,000 kW of home use fuel cell output by 2010, and 10,000,000 kW by 2020. To achieve that goal, we are laying out a specific strategy for what kinds of problems must be overcome, by whom, and by when. With the underlying assumption that the energy, IT, and biotech industries will be the base industries of the future, we must steadily promote the use of fuel cells. It would be a mistake to think that we can implement the technology overnight, but on the other hand we would be equally mistaken to abandon the research due to the difficulties. In the future when we enter an era of hydrogen-based energy, I think fuel cells will definitely be the best choice. Why? Because they are energy-efficient and clean.