To see Nakanashi Project (1996?-2001), Crest, JST,  Web page  (In Japanese) and Kyushu University Crest group's Web page (In Japanese) for reference.

  There are a lot of conflicts in the environmental problems and it is hard to find out the better way to solve even one problem.  For example, DDT had been used as a pestcide for agriculture in many countries and, as the result, had been accumulated through food web.  Therefore DDT destroyed ecosystem and many countries prohibit using DDT now.  On the other hand, DDT is still used in some tropical countries as a pestcide against malaria and other disease vectors.  Recently costs of spraying pyrethoid and prethoid-impregnated bednets, which do less harm to ecosystem than DDT, are decreasing, and some countries change using DDT into these alternatives.  But DDT is still the cheapest method for prevent malaria.
  To deal with these trade-offs between ecological problems, health risk and economy cost, I think Ecological risk/benefit analysis is one the best method.  This method has not been established yet, so I start to establish it.

Studying human behaviour and its society from the evolutionary viewpoints, there are few data or results about the realtionship between them and fitness.  Also these data are not easy to get.  I think (or I want to think )that mathematical models and computer simulation help these studies for checking new hypothesis.

My recent interesting reseaches are below.
(1) How does the behavour, which is not directly related to fitness, effect the fitness?  As an example, we are researching about the effect of spreading a rumor on evolution of cooperation.
(2) We propose a new (or strange?) hypothesis that transitive inference can be evolved under uncertain situations where players can not get correct information of others.
(3)  How to accept a new value,  new culture and new social norm?

As you may know, mathematical models and computer simulation have a big fault.  It means it is too far from the reality.  So the feedback between model works, experimental works and field works is very important.

In the near future I hope I can work with experimental or field reseachers.

 I will start to write it soon!