Senku vs. Tsukasa (千空VS (バーサス) Senkū Bāsasu Tsukasa) is the ninth chapter of the manga Dr. Stone.


The smoke signals can be seen. To do more, Taiju sets out to find wood. Meanwhile, Tsukasa, who has located their location from one of the signals, attacks Yuzuriha with his blade. He threatens Senku to cut her throat if he doesn't tell him the recipe for the revival. Although Senku claims not to be interested in the life of "this woman", Tsukasa sees through his attempt and cuts her hair off.

Despite this, Yuzuriha holds the spear to her necks and encourages Senku to allow her death to keep the recipe of the revival secret. Senku doesn't obey and enumerates every ingredient for the formula.

The other survivors, of whom Senku, Yuzuriha and Taiju were hoping, respond with two more signals.

Tsukasa is pleased that he got the formula and releases Yuzuriha. Tsukasa then suggests that if Senku stops progressing humanity's scientific civilization, he won't have to kill him.

Yuzuriha screams for Taiju. He storms to his friends.

Characters in Order Appearance


  • Kohaku's silhouette is shown. Her name isn't known in the chapter yet.

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Arcs & Sagas
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 139140141142143144145146147148149150

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