the cars from japan have it, they put a closed hook bolt into it and strap the cars down on the boat so they don't get damaged on the voyage over here. I also saw online. tundrasolutions.com they have the pdi checklist on .pdf that a rubber plug should be installed into this before the small square bumper cap is replaced. I see it as a badge of honour allowing others to easy distinguish your car is from Japan vs. an N.A. plant if that means anything to you. it doesn't to most and prob. shouldn't.