 The 2015 Japan Standard Population, JSP, has had a significant impact on the interpretation of health metrics, as it has changed the age distribution of the population. This change has resulted in higher ALCA's mortality rates, which can be seen in both the 2015 and 1985 JSP's. However, the 2015 JSP has shown more consistent trends in mortality rates across different while the 1985 JSP showed more inconsistent trends. This article was authored by Hirokazu Tanaka, Seio Tanaka, Keio Tagawa, and others.