Kokuyo is the father of Kohaku and Ruri, and was the previous chief of Ishigami Village before Senku.
Despite not being chief anymore, he serves as something of a co-leader of Ishigami Village, focusing on more practical concerns like food gathering, while Senku focuses on scientific advancement.
Appearance
Kokuyo is a large man with a big beard and a ponytail.
Personality
Initially, he is a harsh man who disowns Kohaku as his daughter for constantly going against him, such as entering the village tournament and winning to prevent Magma from becoming the new chief and marrying Ruri. He also didn't seem to mind Magma being the new chief, despite knowing that he didn't care for Ruri's well being. However, he does care for Ruri, as he worries for her health. He is wary of outsiders, especially Senku, but later grows to accept him and states that making him leader was not a mistake. He seems to later reconcile with Kohaku, as he realizes how hard she worked carrying water for her sister every day to delay her illness. He can be rather simpleminded, believing the tungsten that Senku brought was for throwing at enemies and not realizing that he was going to use it for an experiment. Ruri and Kohaku claim this is because he came from the older generation. He seems to want to become closer to his daughters and becomes saddened when they don't reciprocate. For example, he gave Kohaku her shield and when Senku suggested using it in one of his inventions, he shyly remarks that he is fine with it as long as Kohaku is, but clearly anticipates her to reject. He is saddened when she shows no sentiment towards the shield and quickly uses it in the invention.
Abilities and Skills
History
He won one of the previous village games and became chief.
Plot
Kingdom of Science Arc
Village Games Arc
He declares Senku the winner of the village games and reveals the name of the village to be Ishigami Village, which is also Senku's last name.
Vs. Hyoga Arc
He defends the village with the katanas that Senku, Chrome, and Kaseki make.
Communications Arc
When Senku makes electricity, he celebrates that the villagers can focus more on food and material gathering.
Trivia
- His name contains the kanji for Black (黒 Kuro) and Jewel (曜石 Youseki) and, put together, mean Obsidian (Kokuyouseki), in keeping with the fact that all other members of Ishigami village have names referencing metals and crystals.
References
| Alabaster • Argo • Carbo • Chrome • Ganen • Genbu • Ginro • Hagane • Jasper • Kaseki • Kinro • Kokuyo • Magma • Mantle • Natri • Sagan • Sho • Tetsuken • Titan • Unmo | ||
| Alumi • Azura • Beryl • Dia • En • Garnet • Kohaku • Kujaku • Namari • Ruby • Ruri • Sango • Sapphire • Shirogane • Shovel • Suika • Suzu • Turquoise | ||
| Soyuz's father • Ibara • Matsukaze • Moz • Oarashi • Soyuz | ||
| Amaryllis • Kirisame | ||