Japan is number 10 among the top 15 countries reporting the highest suicide rates.
The four people who formed a suicide pact and locked themselves in a car filled with carbon monoxide is part of the reason.
Deep in the forests of Tochigi prefecture, some woodcutters found a car parked on a small path on a hillside.
Inside were three men, 20, 22, 38 and one woman, 30.
Three charcoal burners in full use were found in the back of the car.
The four found each other on an Internet website for those wanting to commit suicide.
The top fifteen countries- 
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