The Z=1 Stone World is the new name for Earth thousands of years after humanity vanished from the world and turned to stone.

Christened by Senku, the Stone World is still the Pre-Petrification World, claimed by nature and time. Statues of humans are littered around the world. There are still some intact civilizations, such as Ishigami Village.


Year 2022

  • On the 3rd of August (calculated from chapter 13)The Stone Era begins, and the entire world is petrified. Byakuya Ishigami and the other survivors return to Earth and begin to repopulate it.

Year 5720

Year 5738

  • Senku breaks from his rock prison April 1st after being petrified for 3715 years and 241 days. He gets to cultivating his own tools and developing a way to heal petrification.
  • Taiju Oki breaks out around October 5. He reunites with Senku, and both of them begin to work on the depetrification formula.

Year 5739

  • Taiju and Senku perfect the formula around a year after Taiju's release. They free Tsukasa Shishio to protect themselves from a lion attack, and Yuzuriha soon afterwards.