Dr. Stone: Ryusui

Senku revives a ruthless shipping heir to pilot humanity’s first stone‑age oceanic odyssey.

With the stone age finally giving way to a fledgling civilization, Senku Ishigami’s grand scheme to trace the source of the petrifying green light now requires a vessel capable of crossing oceans. The first hurdle is building a seaworthy ship from scratch, a task the genius tackles alongside Tsukasa’s former allies who swiftly erect the hull and rigging. Yet a captain—someone who can navigate the uncharted waters and keep a ragtag crew in line—is still missing. Enter Ryuusui Nanami, the cold‑hearted scion of the world’s most powerful shipping dynasty, frozen in stone just as the new age awakens. Senku revives him, betting that the boy‑genius’s encyclopedic knowledge of sailcraft will outweigh his prickly demeanor. Ryuusui, awakened to a world where property is meaningless, sees an opportunity to claim the seas for himself. He agrees to steer the ship, but only if Senku can secure the ultimate fuel: oil. Together, they embark on a high‑stakes quest to locate the “king of fuels,” setting the stage for a daring maritime adventure that blends scientific ingenuity with swashbuckling ambition.

This TV special follows the science-focused crew as they build a sailing ship and revive a brilliant but arrogant naval heir to captain it. Expect light adventure, comedy, and problem-solving with very little objectionable material beyond standard shounen banter and the series' stone-petrification backdrop.