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Foreign nationals in Japan, particularly Koreans and Chinese, exhibit suicide rates similar to or higher than the Japanese population. Korean residents in Japan showed significantly higher suicide rates than those in South Korea, suggesting unique adversities.

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Area of Science:

  • Sociology
  • Public Health
  • Demography

Background:

  • Understanding suicide trends among foreign-born populations is crucial for public health.
  • Previous research has not extensively detailed suicide rates for diverse foreign national groups in Japan.

Purpose of the Study:

  • To analyze age-adjusted suicide rates among eight foreign national groups in Japan from 1980 to the mid-2010s.
  • To compare suicide rates of foreign nationals with the Japanese population.
  • To investigate the factors influencing suicide rates among Koreans in Japan by comparing them with South Korean rates.

Main Methods:

  • Utilized nationwide death records from the Vital Statistics of Japan.
  • Calculated age-adjusted suicide rates by sex for Brazilian, Chinese, Korean, Peruvian, Filipino, Thai, UK, and US nationals.
  • Computed rate ratios and conducted comparative analyses between Koreans in Japan and South Korea.

Main Results:

  • Koreans and Chinese in Japan had suicide rates comparable to or exceeding Japanese rates.
  • Koreans consistently showed high suicide rates, nearly double that of the Japanese population.
  • Korean males and females in Japan had higher suicide rates than their counterparts in South Korea.

Conclusions:

  • Suicide rates among immigrants in Japan are not solely dictated by host country rates.
  • High suicide rates among Korean residents in Japan may stem from specific disadvantages and adversities faced within Japan.
  • Further research into socio-economic factors affecting foreign national mental health in Japan is warranted.