Immigration to Japan

Immigration to Japan is gradually increasing. There are now 2.76 million foreigners living in Japan, about 2.3% of the population. The biggest source countries are China (745,000), Vietnam (476,000), South Korea (412,000), and the Philippines (291,000). The government hasn't said much about this, but the policy of admitting more foreigners must be a response to the crashing birth rate.

One thing I was curious about was how much of this is Japanese men marrying foreign wives, which I remember hearing was a big thing. But wikipedia has this:

International marriage migration used to represent as much as 25% of permanent migration flows to Japan, but this trend has been in decline since a peak in 2006. . . . In 2006, according to data released by the Japanese Ministry of Health, Labour, and Welfare, 44,701 marriages, or 6.11% of all marriages registered in Japan were to a foreign national. In 2013, this number had fallen to 21,488 marriages or 3.25%.

So not as much of a big thing as it used to be.