Wackiest Japanese Inventions You Have To See to Believe 28. Earplug Earrings This amazing piece of jewelry can function as classy earrings, as well as, earplugs. 29. Cockroach-killing Slippers These slippers are specially-made to kill cockroaches from a distance. Prev Next Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21