Sagara (サガラ|Sagara) is the pig that helped find the black gold (oil) for the Kingdom of Science.
Sagara has the appearance of a general Inoshishi piglet, the Japanese Wild Hog.
After becoming Suika's pet, Sagara is given a rope necklace to symbolize being part of the Kingdom of Science.
Sagara was most likely captured by Kohaku to herd the pigs and make a pig farm so Francois can cook them. Later, when he was about to get cooked, Senku stops Francois, and Sagara is put to work with Suika to help find the Sagara oil field. Under his guidance, Senku and the gang manage to secure the oil fields.
Francois is nudged by Senku to claim that Sagara is not fit for eating, due to being exposed to the oil. Suika then names him Sagara and he becomes Suika's second pet as a reward for her hard work. Suika then makes a rope collar on his neck. Sagara silently thanks Senku for sparing his life.
- Sagara is named after Sagara Oil Field, located in Makinohara, Shizuoka Prefecture, Japan.