Righteous Science-User ( () () () () 使 () Seigi no Kagaku Tsukai) is the 150th chapter of the Dr. Stone manga.


Descending down a river, Senku's group discusses a new threat posed by the culprit behind the machine-gun attack. Senku and the group deduce that the attacker was likely de-petrified on their own like him and that their scientific tools are more advanced than the groups.

In the midst of the discussion, Ukyo notices an engine sound coming from above. After a brief argument of what should be done, they increase their descending speed whilst being assaulted by another machine gunfire. Ginro panics as Matsukaze is grazed and Yo desperately tries to shoot the plane above with Hyoga telling him it's pointless and a waste of ammo. Soon after, Senku quickly combines water and calcium carbide to form acetylene gas, which he then gives to Kirisame who throws it at the plane, knocking the engine down and making the plane crash, much to the pilot's amusement.

After they come out of the crashed plane, the mysterious attacker explains to the person on the other end of their communication device how the attack was carried out. Senku's enemies conclude that the opposing group has an experienced scientist just like the pilot.

Once things have calmed down, a scared Ginro suggests running away as their foes might bring reinforcements now that their attack has failed, while Senku and Ryusui gleefully disagree and suggest they take the crashed plane before reinforcements arrive. As they drag the stolen plane down the river, Senku and Ryusui celebrate, having captured a part of their enemy's firepower.

Characters in Order of Appearance

Chapter Notes

  • The Kingdom of Science acquires the plane of the enemy.
    • Ryusui wants it for luxury traveling.
    • Senku wants it to learn how to reverse-engineer the technology.
  • The person in the plane has a radio and cigarettes.
  • The face of the revived American is seen. However, their name and gender are unknown.
    • There appear to be more revived people in America.
    • The people of America have created communicators.
      • Given the level of technology, the Americans likely revived quite a few years before Senku did.
    • It seems they have mistaken the Kingdom of Science for the true enemy.

Site Navigation

[v  e]
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 2021222324
Source of the Petrification Saga
Age of Exploration Arc
Chapters 8384858687888990919293949596979899 100
Treasure Island Arc
Chapters 101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138
The Truth of the Petrification Saga
New America City Arc
Chapters 139140141142143144145146147148149150151152153154155156157158159160161162163164

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