Chapter 167 opens with a flashback to the previous chapter, in which the narrator explains that the two drawings in this chapter are the same. The first is a pencil drawing and the second is a spiral drawing. The narrator notes that the first is made in pencil and that the spiral drawing is made of iron bars. He explains that this is because the island is made up of man-made things, and that this island was the place where scientists tinkered with the dna to make extinct animals. The second drawing is a pyramid, and the narrator points out that the pyramid is a monument to the island's remaining inhabitants. He speculates that if people still lived on the island, then there must be traces of them. He suggests that they head back to Japan to find out how many months they've been in the island. He wants to go see a concert so that he'll be rich when he gets home. He wonders where they're going with the story, and wonders if they'll find anyone else.