This photo was taken in Suginami Ward, Tokyo—a ward led by a leftist mayor akin to figures like Starmer or Zoran Mamdani. It shows a violent protest group—affiliated with the Socialist and Communist parties—occupying a park under the guise of a rally; having driven away children and mothers, they are now holding a drinking party there.
Practices such as sitting directly on the ground, or placing food, drinks, and tableware (which touch one's mouth) directly on the ground, are unthinkable according to the standards of hygiene and common sense held by Japanese people—who have sat on mats for outdoor dining, such as cherry blossom viewing and picnics, for over a thousand years.
Such behavior indicates that these individuals come from non-Japanese households or from families with extremely low levels of education.