Criterion Blu-ray

Criterion Blu-ray > Arrow Blu-ray > Japan Blu-ray

Both Arrow and Japan Blu-ray seem to suffer from the gamma bug so contrast is more washed out.

Criterion 4K Blu-ray

Criterion 4K Blu-ray see caps: https://slow.pics/c/Ifo4f1EO

Grain is sharper/clearer on the new Criterion 4K; BFI's grain resolves slightly worse and more so in motion, being a standard Blu-ray; The Toho 4K's grain is softer, probably DNR'd.

BFI Player/Amazon WEB-DL

Eureka MoC Blu-ray

MoC slightly better than Criterion http://www.dvdbeaver.com/film5/blu-ray_reviews_69/kwaidan_blu-ray.htm