On average, a man in the nation of Japan has a testosterone level of 502 ng/dl, after 2000.
Is Japan having a decrease of testosterone like the rest of the world?
There’s a weird testosterone decrease in many of the world’s countries, since about 1970 or 1980. Japan is going through this fall in testosterone, unfortunately, but not as bad as some places. However, the testosterone decline is much like the rest of the world’s drop.
More detailed testosterone info
How we got this data
You can see our methods and the data we are using here.