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It Was You (YOU (ユー) ARE (アー) Yū Ā) is the two hundred and twenty-seventh chapter of the Dr. Stone manga.


Disembarking onto the moon's surface, the trio of astronauts prepare to travel. They have a few weapons along with the petrification device, trapped in a small capsule filled with air and a speaker so that it may be activated with a voice command. Kohaku almost activates it in a demonstration.

The team immediately get to work traveling, zooming across the surface in a lunar rover. Their destination is the Taurus–Littrow valley. On the way there, they pass a faded flag, the remnants of a previous manned lunar mission. Senku remarks that it's suspicious they're so close to somewhere mankind has already been, given the size of the moon.

During the ride, Senku's voice tells Kohaku to unseal the medusa capsule. Kohaku is a little confused by his politeness and request, but begins anyways. The voice rushes her, but Stanley reaches back and stops her before it's fully opened. Senku asks what she was doing, and Stanley interrupts her, telling her Senku didn't say anything. They realize this was an attack by Why-man, once again mimicking Senku's voice.

Unfortunately for the team, the seal was broken, and the air escapes from inside the capsule. Why-man thanks them, and the device clicks. Senku calls out to Kohaku to throw it, which she does. The beam begins spreading, a safe distance away, and Kohaku remarks that it was the source of what she'd seen on the moon previously.

This view is the final piece Senku needed to put it all together and discover the perpetrator behind the Petrification.

Characters in Order of Appearance[]

Chapter Notes[]

  • The astronauts travel across the surface of the moon towards the black stain they saw previously.
  • They pass a previous manned mission, one from NASA.
  • Why-man attempts to petrify them by using Senku's voice and tricking Kohaku.
    • It almost succeeds, but Kohaku throws it far enough away that it doesn't affect them.
  • It is revealed that the black stain Kohaku saw on the cameras was actually the residue from a petrification device activating on the moon.
  • Senku discovers who was behind the petrification.


  • The lunar rover Stanley is driving likely broke the land speed record on the moon, as the current one is only 18 kph (10.5 mph).[1]
  • The faded flag they pass is from the Apollo 17 mission.


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Volume 27 Terraforming4D Science: 14D Science: 24D Science: 3
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Story Arcs
Prologue Saga
Stone Formula Arc
Chapters 1234
Episodes 12
Vs. Tsukasa Arc
Chapters 56789101112
Episodes 345
Ishigami Village Saga
Kingdom of Science Arc
Chapters 131415161718192021222324252627282930313233
Episodes 5678910111213
Village Games Arc
Chapters 34353637383940
Episodes 131415
Village Origins Arc
Chapters 4142434445
Episodes 1617
Stone Wars Saga
Vs. Hyoga Arc
Chapters 4647484950
Episodes 1819
Communications Arc
Chapters 5152535455565758596061626364656667686970717273747576777879808182
Episodes 20212223242526272829303132333435
Source of the Petrification Saga
Age of Exploration Arc
Chapters 8384858687888990919293949596979899 100
Episodes 35Ryusui3637383940
Treasure Island Arc
Chapters 101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138
Episodes 4142434445464748495051525354
The Truth of the Petrification Saga
New America City Arc
Chapters 139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169
Episodes 555657
South America Arc
Chapters 170171172173174175176177178179180181182183184185186187188189190191192193
New Stone World Arc
Chapters 194195196197198199200
Globetrotting Arc
Chapters 201202203204205206207208209210211212
Stone to Space Saga
Moon Mission Arc
Chapters 213214215216217218219220221222223224225226227228229230231232