Who’s the photographer?
Normally my answer would be ’no clue’, but by coincidence I do have a source for this one. Hiromu Kira
The Thinker (The J. Paul Getty Museum Collection)

The Thinker (The J. Paul Getty Museum Collection); about 1930; Hiromu Kira (American, 1898 - 1991); Gelatin silver print; Image: 27.9 × 35.1 cm (11 × 13 13/16 in.); 85.XP.29.71

The J. Paul Getty Museum Collection
Great, thanks. Weirdly, he now goes on my list of favourite Japanese damn and hydrological infrastructure photographers, along with Toshio Shibata
Hello hello! He’s in a place called vertigo!