Helvetica Scans
joined Sep 11, 2014
Can anyone enlighten me why Japan thinks cousins are okay, but adopted siblings not?
First cousins are usually more accepted worldwide simply because the blood relation between the two individuals is much much smaller.
The Coefficient of Relationship (the kinship value) between first cousins is only 12% (same as second cousins) whereas the value for full siblings and parents is 50%.
Incest laws usually only pertain to coefficients higher than 25% because that's kind of the point where inbreeding can cause damage.
I know a couple of cousins who got married here and it's not seen as weird and I'm going to guess Japan is the same.
I'm also going to guess it has to do with Japan's history of arranged marriages where often cousin marriages would occur due to a bunch of factors.
Cousin relationships and marriae are also usually not prohibited in a lot of religions, Christianity included.
Overall, it's just been more culturally accepted.
The only countries in the world where cousin marriage is actually illegal are The USA (in most states), China, India, Philippines, Slovenia, Romania, Bulgaria, Serbia and Hungary.
last edited at Jun 12, 2015 9:14AM