Polygamy is illegal in Japan. Shibuya reportedly married some of the women but later divorced them.

Is polygamy legal in China?

Until the Chinese communists took power in 1949, bigamy, concubinage and child marriage were commonplace. In 1950, Beijing enacted a new law that outlawed these practices. The law also enforced monogamy in an effort to make women more equal to men in Chinese society. Polygamy is no longer legal in China.