I'm not sure I would agree with that.

Measures are being taken, and the Japanese government believes that the rate of infection is still very much growing [1]. Schools have been shut down in Japan. And while the government is not actively enforcing quarantining, that may be due to bureaucratic roadblocks. [2]

[1] https://english.kyodonews.net/news/2020/03/8aafa8e3636c-loca...

[2] https://www.japantimes.co.jp/news/2020/03/11/national/politi...