Japan's Justice Minister Takashi Yamashita attends a plenary session of the upper house at parliament in Tokyo on December 7, 2018. - Japan's ruling parties aim to pass through parliament on a bill to bring more blue-collar foreign workers into the country. (Photo by Kazuhiro NOGI / AFP)

Parliament members of the ruling party vote during a plenary session of the upper house at parliament in Tokyo on December 7, 2018. - Japan's ruling parties aim to pass through parliament on a bill to bring more blue-collar foreign workers into the country. (Photo by Kazuhiro NOGI / AFP)

Japan's Justice Minister Takashi Yamashita attends a plenary session of the upper house at parliament in Tokyo on December 7, 2018. - Japan's ruling parties aim to pass through parliament on a bill to bring more blue-collar foreign workers into the country. (Photo by Kazuhiro NOGI / AFP)

Over view shows a plenary session of the upper house at parliament in Tokyo on December 7, 2018. - Japan's ruling parties aim to pass through parliament on a bill to bring more blue-collar foreign workers into the country. (Photo by Kazuhiro NOGI / AFP)

Japan's Justice Minister Takashi Yamashita attends a plenary session of the upper house at parliament in Tokyo on December 7, 2018. - Japan's ruling parties aim to pass through parliament on a bill to bring more blue-collar foreign workers into the country. (Photo by Kazuhiro NOGI / AFP)