Ryusui Nanami ( (なな) () (リュウ) (すい) Nanami Ryūsui) is the son of the owner of Nanami Conglomorate. He was revived by Senku for his expertise in sailing.

Ryusui is the type of person who Tsukasa wouldn't wish to revive; someone who wants to revive the old society (social status and money). However, he can be easily tricked by Senku and Gen into cooperating. Regardless, his wisdom about adventuring at sea or air makes him indispensable as one of the Five Wise Generals of the Kingdom of Science. He is also a member of the Crafting and Development Team.


Ryusui is a fairly tall, muscular young man with shaggy blond hair, some strands of which fall loosely into his face. He has thick eyebrows that are distinctively shaped like arrows, and he holds an intense glare in his eyes, most often seen when expressing things that he desires to have. He's also very rarely seen without a confident smile.

After being revived, he is given a new outfit, which is a garb consisting of a red double-breasted trench coat with a high collar, and captain's hat, designed by Yuzuriha.[9]

He had a stone marking encompassing most of his right hand, which disappeared since his second revival. Ryusui soon adorned war paint in reflection of his stone markings, during Tsukasa's revival.[10]



Ryusui was the Heir to the Nanami Conglomerate, and accomplished sailor. As such, he lived a wealthy and lavish lifestyle. Pre-Stone World, He has been seen as a greedy playboy, rarely seen without the company of beautiful women, exotic sports cars, and excessive partying. Minami was resistant to the idea of reviving him, stating that despite his expertise in ship sailing (of which he is the most skilled), his personality was akin to that of a spoiled, pampered rich boy who ordered others to do his bidding. While initial impressions of Ryusui seem to match this description, as he demanded worship and proclaimed himself the leader of the new world.

In reality, while he is arrogant and greedy, it was his greed that fueled his ambition, which was the cause of his great success pre-Stone World. He spent a great deal of time studying, and was active in ship making, from making small models, to building huge ships. The money he earned, he put toward bettering himself and the company. Senku deduced that his presence would be beneficial to the Kingdom of Science, as his greed does not only apply to himself, but to those around him. He pushes and motivates everyone.

Though a party animal and playboy, Ryusui considers all women to be beautiful. While this seems like empty praise, he even calls the elderly and children beautiful, saying that people are all beautiful in their own way. He even refuses to see a woman cry and his greed extends to ensuring they never cry again. Like Senku, Ryusui has the drive to rebuild society and make a world good for everyone to live in.

He shows that he is selfless and caring, as he was angry Suika for stowing away in their dangerous voyage. Later, as he and the crew were being petrified, he kicked Suika out of harm's way. He is quick to admit his faults, such as when he is revived the second time, Ryusui tells Suika how proud he was of her despite her heavy burden, and declares that she is a fully fledged member of the Kingdom of Science.

He occasionally has a shocked expression, being shocked by Senku's devious nature, the food of the stone world, and Senku's invention planning.[11][12][13]

Abilities and Skills

Ryusui has great strength, as he was able to hold his own in the tug of war with Ibara, whereas Senku was struggling. He is also very fast by being able to keep up with Chrome who is a very fast runner.

Expert Sailor: Years of sailing into the ocean have allowed Ryusui to develop a keen sense on how to judge the ocean. He was able to make a precise calculation and how he can pull the situation off when sailing.

Skilled Pilot Ryusui has also proven to be good at piloting an air balloon. He was also able to pilot the plane the Kingdom procured from Stanley Snyder.

Weather forecaster: After spending years of sailing, Ryusui can predict the weather even when he was not on the ocean.

Intellect: Ryusui is fairly intelligent. In addition to his skills with the weather, he is a skilled ship architect. He was able to deduce that Minami might have the Stone Formula on her since she was in charge of choosing who was depetrified for Tsukasa. He was able to quickly deduce the situation both times he was depetrified. He successfully invested on the financial market to make profit as a child. He also happens to know Morse code. When Ibara pushed the petrification device towards him and Senku by throwing his head on him he improvised by attaching an earpiece to the petrification device so that Senku could activate it using his phone.


Sailing Skills
5/5 A
5/5 A
5/5 A
Ryusui's stats, according to Volume 10

Chapter Appearances

Chapter Appearances
v  d  e
Age of Exploration Arc
83. Dr. Stone Absent
84. People = Power Absent
85. Ultimate Resource Debut
86. Money Appears
87. Senku's Department Store Appears
88. Wings of Humanity Appears
89. Adventures Appears
90. New World Map Appears
91. Need Bread? Start with Wheat Appears
92. Desire is Noble Appears
93. The First Shot Is Yours Appears
94. The Scent of Black Gold Appears
95. First Contact Appears
96. Eye of Science Appears
97. The Joy of Leadership Appears
98. Ryusui Appears
99. Kingdom of Science Photo Journal Appears
100. Origin of the 100 Tales Appears
v  d  e
Treasure Island Arc
101. Treasure Chest Appears
102. Perseus, Ship of Science Appears
103. Light of Hope and Despair Appears
104. Men of Forensics Absent
105. The Island's Great Beauty Absent
106. The Secret of Petrification Absent
107. To the Trump Card Science Vessel Absent
108. Two Trump Cards Flashback
109. The Great Escape Absent
110. Beautiful Science Absent
111. Science Wars Absent
112. King of Three Dimensions Absent
113. Cryptography Science Absent
114. Silently, Science Pierces the Stone Fantasy
115. One Second, One Grain Absent
116. Miracle in Hand Appears
117. The Kingdom of Science Strikes Back Appears
118. Silent Soldiers Appears
119. Science Soldiers Appears
120. Top Secret Absent
121. Medusa's True Face Absent
122. Brain-Battle Puzzle Pieces Appears
123. The Battle of Wits' Deal Game Appears
124. The Invention of God and the Devil Appears
125. The Decisive Three-Dimensional Battle Appears
126. A 3-D Strategy Appears
127. Medusa and Perseus Appears
128. Island-Wide Battle Royale Appears
129. Joker Appears
130. Devil's Choice Appears
131. Nasty Crimes Appears
132. The Strongest Weapon Is... Appears
133. Flash of Destruction Appears
134. Commander Faceoff Petrified
135. Counting Flashback
136. Medusa Vs. Science Appears
137. Last Man Standing Appears
138. End Of Part 3 Appears
v  d  e
New America City Arc
139. First Dream Appears
140. New World Plots Appears
141. First Team Appears
142. World Power Appears
143. Ryusui vs. Senku Appears
144. Ryusui & Gen vs. Senku & Kohaku Appears
145. Bar Francois Appears
146. Bar Francois: Bitters Appears
147. Science Journey Appears
148. Pioneers of Earth Appears
149. Light Lure in Darkness Appears
150. Righteous Science User Appears
151. Dr. X Appears
152. Doctor Vs. Doctor Appears
153. Science Wars Appears
154. Spy vs. Spy Appears
155. Science Is Elegant Appears
156. Two Scientists Absent
157. Same Time, Same Place Absent
158. Who's the Scientist? Appears
159. Lock On Appears
160. Gunshots Echo Appears
161. Craft Wars Appears
162. Down the Earth-Stained Path Appears
163. Multifront Final Battle Appears
164. Re-Lock On Absent
165. Know the Rules, Make the Rules Absent
166. Ultimate Knight Absent


  • Ryūsui (リュウ) (すい) means Dragon Water and Nanami (なな) () means Seven Seas.
  • He is the first person to be revived twice.
    • He is also the first person to be revived three times.
    • Having been Petrified during the final battle with Ibara, he holds the record for the number of times someone has been petrified. A total of four times.
  • His personality is similar to the homunculus Greed from Fullmetal Alchemist. Both are greedy individuals who have a noble side; Ryusui uses his greed to push everyone forward, while Greed values his friends.
  • Judging by his personality, it seems possible that he wants to travel and explore the whole world on the Perseus, even after they reach South America. This was later confirmed when it was revealed that they will indeed travel the world, to collect items for the space shuttle.
  • In Chapter 142, Ryusui says to Minami "I love all women, you see so naturally, that includes you. Men too!" which implies he is bisexual. In the Volume 11 extras, a reader asks how many people Ryusui dated, and he replies with "Every woman is a unique creature with her own charms (the same goes for men!)," further confirming it.


  1. Dr. Stone Manga — Chapter 1, Ryusui is Petrified along with all of Earths Human Population
  2. Dr. Stone Manga — Chapter 85, Ryusui is revived by Senku for the first time.
  3. Dr. Stone Manga — Chapter 103, Ryusui is Petrified along with majority of the Perseus Crew.
  4. Dr. Stone Manga — Chapter 116, Ryusui is revived by Senku.
  5. Dr. Stone Manga — Chapter 134, Ryusui is Petrified along with everyone on the Treasure Island.
  6. Dr. Stone Manga — Chapter 136, Ryusui is revived by Senku to assist in the fight against Ibara.
  7. Dr. Stone Manga — Chapter 137, Ryusui is Petrified once again in a ploy to defeat Ibara.
  8. Dr. Stone Manga — Chapter 138, Ryusui is revived by Kingdom of Science.
  9. Dr. Stone Manga: Chapter 85
  10. Dr. Stone Manga: Chapter 141
  11. Dr. Stone Manga: Chapter 93
  12. Dr. Stone Manga: Chapter 94
  13. Dr. Stone Manga: Chapter 95

Site Navigation

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Kingdom of Science
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Female Yuzuriha OgawaRuriKohakuSuikaNikki HanadaMinami HokutozaiKirisameHomura Momiji
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Pre Petrification Humans
Male Byakuya IshigamiGen AsagiriHyogaRyusui NanamiSenku IshigamiShamil VolkovTaiju OkiTsukasa ShishioUkyo SaionjiYakov NikitinYo Uei
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