Oh yeah I've made some comments on the other forum about those videos. How did your chips happen? Can you share a video of how they rub against the edge?
It's a built-in transponder for the Japanese toll roads (Singapore has something similar). You put your pre-loaded bank card in the slot and it reads/pays automatically when you pass a gantry. Here's more info on ETC 2.0:
https://www.furuno.com/en/its/articles/20171026/