Blade of Science (科学の刃 Kagaku no Yabai) is the forty eighth chapter of the Dr. Stone manga.


For the village's advancement, Senku Ishigami, Chrome, and Kaseki start forging Japanese swords for all their warriors. Senku explains how the task of making these swords is very difficult and tedious, but Kaseki easily learns it. Kaseki was able to make enough swords to equip every capable fighter in the village.

Later on the village was attached by Tsukasa Shishio's people. The villagers faced off against Hyoga and his followers, but the villagers the upper-hand due to there advanced weaponry, as they broke the enemies weakly forged weapons.

Gen's betrayal was revealed to the villagers as he was seen telling information of the village and its strongest fighters, but was also helping the villagers by implying that teaming up will help them win. Kohaku and Magma then team on , defeats Magma but before stabbing Kohaku; his weapons break. It is revealed that Gen double crossed by tampering with his weapons causing it to fall apart in battle.

Gen and Senku team up against as they attack him their new swords.

Characters in Order of Appearance

Chapter Notes

  • Hyoga's spear is destroyed by Gen.
    • Gen officially allies with Senku with his betrayal revealed.

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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
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Village Games Arc
Chapters 34353637383940
Episodes 131415
Village Origins Arc
Chapters 4142434445
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Stone Wars Saga
Vs. Hyoga Arc
Chapters 4647484950
Episodes 1819
Communications Arc
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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 139140141142143144145146147148149150151152153154155156

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