The statement that most accurately presents the information from the bar graph is:
"In Japan’s region, the ratio of working-age teens and adults to elderly people will be 4:1 in 2050, so the cost of caring for the elderly population will be high."
This aligns with the projected elderly support ratio data for the various regions as outlined, particularly highlighting the challenges Japan may face in supporting its elderly population given a lower ratio of working-age individuals to elderly individuals.