Similar to its world leading average life expectancy and healthy life expectancy, Japan
maintains high health levels. However, lifestyle-related diseases such as
cancer account for approximately 30% of medical expenses,
or in excess of 30 trillion yen, and thus improving individual lifestyles and developing a social environment that support that are becoming important issues. In addition to
conventional infectious diseases such as polio and measles, pandemic influenza spread
throughout the world in 2009 and thus infectious diseases still remain serious threats in our lives.