The Japanese Breast Cancer Society clinical practice guidelines for epidemiology and prevention of breast cancer, 2022 edition.

Breast cancer mortality ranked fifth after colon (24,338), lung (22,934), pancreas (19,245), and stomach (18,590) cancer, and age-adjusted mortality has shown an increasing trend since the 1960s (Fig. 1 ).

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In contrast, there has been a decreasing trend in the 40–54 age group since around 2000.

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