Main point: "...income has declined across the income percentiles, and the share of low-income households has risen as those of middle- and high-income groups shrink."
Supporting points:
"...the share of low-income households has been rising at the expense of middle-income groups in a process of secular income decline across percentiles.”
"Japanese companies have also been converting regular workers — who could previously enjoy the comparatively privileged lifetime-employment system — to part-time workers."
"...the disappearance of Japan’s middle class could lead to further stagnation in consumption."
