The aim of the paper is to examine the characteristics of Japanese pro-social behavior in comparison with Korea from the cultural and ethical perspectives and give implications for an adult moral education in both countries, which is an important part of adult and continuing education. The initial motivation for the paper lies in the Japanese selfless pro-social behavior shown in the wake of the March 11, 2011 earthquake and tsunami in the east coast of Japan, which won global respect and affection. By exploring the nature of Japanese pro-social behavior from cultural and ethical perspectives, the research claims that Japan (and, by implication, Korea), as many argue, is a culture integrated through a relative emphasis on shame, leading to view morality in a situational context based on its impact on significant relationships. While joining the people taking an adoring view toward Japanese reaction to the natural crisis, this study gives some important implications for adult moral education in Japan (and, by implication, Korea) that the pro-social behavior in Japan should not be confined to their own community or country, but need to extend toward the people outside their own country.