Ochimizu

Ochimizu (をち水), also known as the "Water of Life", is a special potion that gives the person who drinks it the ability of extreme regeneration, even healing fatal injuries, and also enhanced strength and speed. However, it has very severe side effects: becoming bloodthirsty and taking on a demonic state with white hair and red eyes, feeling weak and pained in the sunlight, and developing a weakness to silver. Researched and popularized in Japan by Koudou Yukimura under the Bakufu's order, it was tested on the Shinsengumi's lower officers. Later in the anime, Koudou improves the Ochimizu so that Rasetsu are not effected by sunlight. It was initially created with ingredients from the West, including the blood of Western demons, and diluted with water from the Yukimura village in Mutsu, Shirakawa.
The only way to kill someone who drank the Water of Life is to pierce their heart or chop their head off; all other wounds inflicted on someone who had drank the water of life would heal instantly. 
==Story==
The main scientist who worked on it was Chizuru's father, but later when he disappeared during a fire at the clinic where he worked, research on the medicine was halted for a time until Sannan rebooted research on it using notes left behind.
#The first version of the medicine had the following effects:
#*the person would lose their mind,
#*their hair would turn white,
#*their eyes would turn red, 
#*they would go into a furry rage and begin attacking those near them and attempting to kill them and get their blood,
#*it was no use trying to reason with them.
#After developing it further and improving it, the medicine was given to a captured prisoner and the same effects were exhibited except for the fact that the person was able to keep their mind for a short time and was able to talk for some time before fully losing their mind and running away. Another side effect was a burning throat which throbbed with extreme pain and agony.
#Then, after further development, they were able to create a version of the Water of Life that allowed people to keep their mind and ability to reason. These people could have their blood lust and agony contained by taking a powdered herbal medicine. However, it was only a temporary fix, and the person (now a fury) would have to eventually take more of the herbal powder or give in to their bloodthirst. Also, a fury had to be kept away from blood, since the sight of it would trigger their lust and make them turn into a fury.
#There was more research on it, until people were able to enter and leave furry mode at will, choosing when they use their fury powers and when they are normal. Side effects were now greatly reduced.
Often those who disobeyed the code of conduct for the Shinsengumi were forced to either commit honorable suicide or drink Ochimizu and become a Rasetsu. Later on, the main Shinsengumi members take Ochimizu to survive dangerous injuries they had sustained from fights with Kazama Chikage and his cronies.
==OVA 2021 side effects==
As shown in Episode 3 of OVA 2021, taking a double dosage of Ochimizu can lead to:
#Increased size of muscles and potentially bones;
#Regeneration/reattachment of cut-off limbs;
#Hallusination of blood-red demons around;
#Double-increase in physical strength and speed.
Sakai's new form OVA 2021.png
Sakai attacking the Shinsengumi OVA 2021.png
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Sakai_attaching_his_cut_off_hand.png
Sakai's_hallusinations.png
Sakai's_hallusinations_2.png
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Category:Anime
Category:Visual Novel
Category:Shinsengumi