This has been featured around the Innernet recently, so why not here? Personally, my biggest skepticism is that I suspect it actually needs a mix of dark soy sauce and a much lighter sauce that floats on top?
I dunno though, maybe the ‘trenches’ are so deep that it works with simple soy sauce? Pretty dang clever, either way.
In the spirit of Starship Troopers, if you’d like to know more:
https://www.boredpanda.com/dishes-sauce-images-appear-3d-print-japanese-redestu/
I got these (and the chopstick holders) as a wedding gift from a friend in Japan, we either used kikoman low sodium or the soy sauce that was included with the sushi
The top one is boss. Makes me wish there were Nazca-line versions, which culturally makes no sense(!)
That origami crane holder is also pretty cool…