What the Japanese did during WWII was reprehensible, and I had a difficult time wrapping my head around this dilemma as I grew up, since I lived in Japan AND the Philippines for a few years each, and I really liked the Japanese people. Then in the Philippines, they had a very different outlook on them, for obvious reasons.
It confounded me, how could such seemingly nice, gentle, art-loving, sensitive people be the kind who would routinely do things like force a garden hose down a prisoner's throat, fill them with water, and stomp on them for enjoyment? They were a paradox to me, and it says something about human behavior I would rather not understand.
The Slate article has a link to the museum which has the artifacts from this man's life in the Guam jungle, and I post them here for your perusal.
Link to Nagoya City Museum page with articles displayed
Shochi Yokoi 1942
Shochi Yokoi 1972
Homemade clothes from tree bark thread (front)
Homemade clothes from tree bark thread (back)
His rifle he maintained
He was a tailor before the war, he made his own clothes on this loom he made from his own thread made from bark
Sample of fine thread he made from tree bark
Sample of coarse thread/twine he made from tree bark
Some items from the cave:
Some more items from the cave
His kitchen utensils
A container he made with cap
A container uncapped