Why does Japan have such a low birth rate?

Hentai

because they are the smartest culture on Earth

Karoshi is taking its toll.

They're too busy with strange game shows

lack of sex.

http://www.japantimes.co.jp/community/2016/02/10/voices/japan-birth-rate-beginning-end-just-new-beginning/#.WGwlslMrIdU

They have more then half a brain cell and recognise the meaning of sustainability?..
That or a lot of baby's are killed? 🤔

Well some racists would have you believe that automation and advanced technology reduces the need for more people but this is discriminatory racist and islamophobic anti immigrant/anti diversity propaganda

The sperm can't reach ta fertilize d eggs with their small dicks and all