I was looking through my Amazon Japan purchase history.
In November 2014, almost a full decade ago, I bought some reusable plastic chopsticks. The brand is apparently called "Hasekin".
Anyway, these things LAST. The most damage that's happened in a little over 9 years of use is the tip of one chopstick (out of 20) breaking off.
These are good fucking plastic chopsticks. Five stars.