Originally, it was possible for a place in a stable to open up if a foreign born wrestler acquired Japanese citizenship.

This figure does not include those who have adopted Japanese citizenship.

To do so he had taken Japanese citizenship in 1980.

Because his parents were Japanese citizens, he also had Japanese citizenship.

In 2007, he acquired Japanese citizenship automatically as a result of his father's naturalization.

Even in the desperate times soon after the war he refused to consider Japanese citizenship, which would have brought him plenty of benefits.

For once, she faced no discrimination and even considered getting Japanese citizenship.

Later in his life he acquired Japanese citizenship.

He moved to Japan at age 10 and obtained his Japanese citizenship in 2003.

Japanese citizenship used to require adoption of a Japanese name.