‘Increases in perinatal mortality in prefecturescontaminated by the Fukushima nuclear power
plant accident in Japan’(S Hagen, K Mori, K Hayashi. Medicine2016;95:38)(‘perinatal death’ : death of fetus or the newborn
after 22 weeks of pregnancy to 7 days after birth
which is one of the most reliable data in Japan)

医療問題研究会IMONKEN
Keiji Hayashi• Descriptive observational studies showed upward jumps insecular European perinatal mortality trends afterChernobyl.
• The question arises whether the Fukushima nuclear power
plant accident entailed similar phenomena in Japan.
• We used data from the survey report of the Ministry ofHealth, Labor and Welfare ("e‐STAT") to 2001‐2014.
• Statistical analysis was done by Hagen Scherb (HelmholzZentrum Munchen, German Research Center for
Environmental Health, Institute of Computational Biology).

Monthly perinatal mortality in Japan excluding the 6
severely and 3 moderately affected prefectures.
The white circle is the monthly perinatal mortality rate,
which shows reduction by about 4% （OR=0.96) annually.
Data from 2001 to the end of 2014.
There is no change before and after the accident.

Pollution degree map inDecember 2011 (created byYukio Hayakawa, GunmaUniversity).
Six prefectures Fukushima
Iwate, Miyagi, Ibaragi, Tochigi,Gunma, with many areas of0.25 μSv / h or more.
The lesser areas of Chiba,Saitama and Tokyo are
considered to be "moderatelycontaminated areas“.

Monthly perinatal mortality in 6 severely contaminated prefectures（Fukushima, Miyagi, Iwate, Ibaragi, Gunma, Tochigi)
Estimating a jump 10 months after the Fukushima accident yields theupward jump OR 1.156(95%CI;1.061 to 1.259)
The jump in the perinatal mortality proportion form January 2012 toDecember 2014 may be translated into 165 excess case.

Copyright © 2016 Medicine. Published by Lippincott Williams & Wilkins.

5

3 moderately contaminated prefectures: Chiba, Saitama,Tokyo. The estimated jump 10 months after the accident
yields an OR of 1.068 (95%Ci;1.001 to 1.139)
The effect translates into 153 excess perinatala death cases.

Monthly mortality of fetus and infants between 12 weeks after pregnancy andless than 1 year old in 11 moderately and severely contaminated prefectures,additonally including Niigata and Yamagata. Estimating a jump 10 months afterthe Fukushima accident yields the upward jump OR 1.068(95%CI;1.035 to 1.101)
The jump in the mortality proportion during 4 years (form January 2012 toDecember 2015) may be translated into 1140 excess case.

Perinatal death is one of the most reliable numbers, as fetuses after 22 weeks must bedelivered. However, the actual situation of the damage is more obvious, considering there
could be many people who died “between 12 weeks and less than 1 year old" including
perinatal death.

Nationwide Increase in Complex Congenital Heart Diseases After the Fukushima Nuclear Accident
Kaori Murase Joe Murase Akira Mishima
Journal of the American Heart Association. 2019;8

A:‘early’ : pre‐ organogenesis period, except for “coronary disease” and “others.
C:‘Complex’ : the complexity of the malformation

In A and C, the number of operations has increased since 2011.
A ’early’ and C‘complex’ are more life
threatening heartdisease than others.
An increase in A and C
are likely to be one of
the causes of anincrease in perinatalmortality.
Because it is thenumber operated, it islikely to die later, andthe rise in mortality
may be in 2012.

Increase in Cryptorchdism
Discharge rate (per 10million) after
which cannot be diagnosed
cryptorchdism surgery
before birth.
Therefore, there is no impact of It has increased sincefiscal 2012.
artificial abortion.
This data also indicatesthe occurrence ofradiation‐induced
malformation, andsupports the increasein perinatal mortality.
Kaori Murase et al.
Nationwide increasein cryptorchidism
after the Fukushima
nuclear accident.
Urology 2018;118:65‐
70

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