Oneshot translated as 'Vagabond Plain' in the English release for Slum Wolf

(from ebookjapan):

One day a man crouched down on the river bank and watched the dancing ears of grass for two or three hours, then plodded into that sea-like land of the unknown...

He had no purpose...

There were so many people who had no choice but to walk around and lie and lie and lie. Men piled up junk they had gathered from somewhere...and made a house. The house looked like a mushroom that had crawled out of desperation... (from the title story "Scoundrel's Field"/"Vagabond Plain")

This is a masterpiece collection of short stories by Tadao Tsuge, a master of Gekiga, depicting the intense lives of men crawling around with a sorrowful yet somehow gentle gaze!