The top comment in the third link points out that Microsoft Japan later walked back the productivity claim:
In the announcement dated October 31, one of the listed "improvements" from the 2019 Summer Work-Life Choice Challenge was an increase of 39.9% in labor productivity (sales revenue per employee) in August 2019 compared to August 2018, with a graph below.
While this number is factual, it is not solely the result of this challenge, and was achieved due to a number of different factors.
To avoid misunderstanding, we have removed that claim from the above summary of the direct effects of the challenge.
In the announcement dated October 31, one of the listed "improvements" from the 2019 Summer Work-Life Choice Challenge was an increase of 39.9% in labor productivity (sales revenue per employee) in August 2019 compared to August 2018, with a graph below.
While this number is factual, it is not solely the result of this challenge, and was achieved due to a number of different factors.
To avoid misunderstanding, we have removed that claim from the above summary of the direct effects of the challenge.