There are people who question their parent-child relationship and worry if they are actually related. That's why it's important to know. It's up to the individuals to decide what to do after being presented with the results.

An executive at a DNA testing firm. DNA paternity testing is becoming more common in Japan but some experts argue that such tests do not help the welfare of a child, as the relationship between a husband and wife, or parent and child can break down depending on the results -- greatly affecting a child's future.

© Mainichi Shimbun