Japan Statistics

Introduction

Japan

This page links to the current online resources available to explore Japanese population and birth data.

| Category:Japan

Some Recent Findings

Japan - Nationwide Increase in Cryptorchidism after the Fukushima Nuclear Accident "To estimate the change of discharge rate after cryptorchidism surgery between pre- and post-disaster in Japan. Cryptorchidism cannot be diagnosed before birth and is not a factor that would influence a woman's decision to seek an abortion. Therefore, this disease is considered suitable for assessing how the Great East Japan Earthquake and subsequent the Fukushima Daiichi nuclear accident (2011) influenced congenital diseases. We obtained cryptorchidism discharge data collected over six years from hospitals that were included in an impact assessment survey of the Diagnosis Procedure Combination (DPC survey) database in Japan and used these data to estimate the discharge rate after cryptorchidism surgery before and after the disaster. The 94 hospitals in Japan that participated in DPC system and had 10 or more discharges after cryptorchidism surgery within successive six years covering pre- and post-disaster period (FY2010-FY2015) were involved. The change in discharge rate between pre- and post-disaster was analysed using a Bayesian Generalized Linear Mixed Model (GLMM). Nationwide, a 13.4 % (95% credible interval 4.7-23.0 %) increase in discharge rates was estimated. The results of all sensitivity analyses were similar to the reported main results. The discharge rate of cryptorchidism was increased nationwide. The rates of low-weight babies or preterm births, risk factors of cryptorchidism, were almost constant during the study period, and age distribution of the surgery was also not changed, which suggested that the other factors that associated with the disaster increased the incidence of cryptorchidism.

genital abnormalities

Embryology

Links: Kyoto Collection

General Statistics

• Population: 127,103,388 (July 2014 est.)
• country comparison to the world: 11

Age structure

• 0-14 years: 13.2% (male 8,681,728/female 8,132,809)
• 15-24 years: 9.7% (male 6,429,429/female 5,890,991)
• 25-54 years: 38.1% (male 23,953,643/female 24,449,655)
• 55-64 years: 13.2% (male 8,413,872/female 8,400,953)
• 65 years and over: 24.8% (male 14,218,655/female 18,531,653) (2014 est.)

Median age

• total: 46.1 years
• male: 44.8 years
• female: 47.5 years (2014 est.)

Population growth rate

• -0.13% (2014 est.)
• country comparison to the world: 210

Birth rate

• 8.07 births/1,000 population (2014 est.)
• country comparison to the world: 222

Death rate

• 9.38 deaths/1,000 population (2014 est.)
• country comparison to the world: 58

Mother's

• Mother's mean age at first birth 30.3 (2012 est.)
• 5 deaths/100,000 live births (2010)
• country comparison to the world: 176

Infant mortality rate

• total: 2.13 deaths/1,000 live births
• country comparison to the world: 223

Ethnic groups

Data: The World Factbook Japan

External Links

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• The World Factbook Japan

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Cite this page: Hill, M.A. (2026, September 16) Embryology Japan Statistics. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Japan_Statistics

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© Dr Mark Hill 2026, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G