As he had been near the detonated Bijûdama, Yato was thrown far away from the destroyed country to another place altogether.
After a while of regaining his consciousness, Yato found himself in a very unknown place being unable to move, as he was jammed tightly into the mountainside that he had crash landed. With some of couple of tries, Yato managed to free himself and as he landed on the on ground, Yato found out that he was in a very small deserted island.
While he was walking around, as he was passing a lake, Yato saw his reflection on the water. At first he didn't pay attention much but when he saw a X shaped scar on his chest, he began to remember of what happened a couple of weeks ago. Even it was just some flashbacks, it was enough for Yato to drop on his knees with a lot of despair. While his body was sitting on the ground motionless, Yato's mind was running rampart. As he over thought of why something like this happened bitterly, without being able to control his feelings, Yato began to roar in outrage. As an answer, many large tendrils of chakra began to shoot towards him from the atmosphere and terrain around him.
As his dual eyed Rinne Sharingan was active, most of nature chakra began to get absorbed inside his very eyes and led them to evolve. His completely red colored Rinne Sharingan began to change into *Shin-Rinne Sharingan with white circles and tomoes together with the color, after his red irises, changing into black.
After his clan's undeserved demise, Yato swore revenge to every beings in the whole world that wanted Kokketsu for their own selfish gains to kill, whether they were human, noble, demon, monster or beast.
A long period after, as a means to make his revenge much easier, Yato activated his Daisan no Rinne Sharingan on the moon´s surface and saw everything that his Byakugan couldn`t reach, even lip movements.
Because of his growing darkness and hate, during his revenge for his clan together with the aim of making Kokketsu a taboo word and power source, Yato continued to kill hundreds to thousands of people with destroying villages even countries, soo much that he was seen as the Enemy of the World.
However, although he was the most dangerous being to ever live for the majority of the world, in a Age where power is the key to survive, to his complete annoyance, Yato was hunted because of his omnipotent destructive power from the death wishing imbecile power-hungry leaders, kings/queens and nobles. These people didn´t only hunted him because of their selfish gains, but they also gave him the epithet the 'Ancient Weapon' that obviously rejected his existence.
Some centuries later, around 600 years before Kaguya was born, while he was being in the middle of destroying a country, Yato unleashed all of his Deadly Black Chakra to kill all of the people in the country that he deemed not to be worth his time. To his slight surprise, the King of this Country had survived after managing to active on right time an Anti-Curse Barrier Seal around himself. As he saw the Kekkai-Fuin with his two eyed Byakugan merged Shin-Rinne Sharingan, Yato quickly transported himself to where the King was.
Even possessing a strong will, the King froze in his place in fear, after seeing a very pissed off crazy smiling Yato. Knowing he would be murdered in the most cruelest way by the Monster, in a fit of his fear and survival instinct, his whole brain began to work more than it was before. After seeing Yato´s white streaked black chakra and his glowing dark body, Seizon said just one word that stopped the nearing Yato in his tracks. The word that Seizon said and Yato heard was "Kaguya".
Right afterwards of hearing the beautiful name with his Shin-Rinne Sharingan being on, the condition that was needed to active his future seeing ability, Izanagi no Senken, was fulfilled.
Just after hearing the name 'Kaguya', Yato found himself in his mind scape, which consisted of Moonless Night Sky and deep clear Mirror Sea, while he was looking around to find the reason of coming here, he noticed a soft but warm light coming down from above. As he raised his head up to the sky, Yato was shocked to see a brightly shining Moon, as he had always wished to have one.
While he was gazing at the moon with admiration, from behind him began to rise a warming shine like a white sunrise. As he noticed the rising light, Yato turned behind him to see of what is going on. To his disbelieving eyes, Yato saw all of his future family members smiling softly at him, with his Soulmate standing right before him while calling him to her and to his bright future.
After seeing his would be future, Yato´s black hair, chakra and sclera changed instantly to white. While he was still in shock, after telling to Seizon to rest in peace as he had gotten to his right side, Yato transported himself to a Sky Island, Tenya-jima that Mangetsu had used as his own home for a long time. As he leaned down and sat under a tree, without being able to control his returning lost emotions, Yato cried to sleep after a long-long time.
Because of his would be bright future, as a means of weakening himself and gaining somewhat balance of his overwhelmingly powerful chakra and strength, Yato divided his body and chakra into Yin and Yang equally.
However as a result of splitting himself in two, Yato learn that some of his actions had been controlled by his darkself. Yato's darkself and Yin-half, Ōkage was actually a being that came into creation in Yorugami no Mikoto´s time, when Yorugami still had the Duty of Balance. Afterwards of Yorugami´s banishment, as an Incarnation of the Darkness, knowing whoever controlled Yorugami could achieve World Domination or World Destruction, Ōkage had latched into Mangetsu as a shadow when he was still a child. After Yato divided himself into Yin and Yang, he had actually managed to free himself from Ōkage.
As he learned of what sort of things Ōkage had done behind his back together with reminding him about the day of the massacre as a nightmare many times over again, Yato attacked Ōkage with vengeance. And in short amount of time, their battle became a full out war between each other and both of them fought a very gruesome fight that reached to the space and destroyed many realms, planets even minor worlds.
After nearly three weeks of fighting in the space, Yato came out victorious. As he knew if he were to let Ōkage all alone, a calamity enough to destroy the world, if not the whole universe would come, Yato sealed Ōkage inside one of the existing three Shinju`s with the Six Paths: Elemental Holy Cage Catastrophic Planetary Devastation Seal, Rikudō: Genso-Seirō Chibaku Tensei Fuin.
With being unable to escape from the very powerful seal and having his most precious thing, his freedom taken away from Yato all of people, Ōkage began to loath and resend Yato passionately, and as a means of getting his revenge, he began to plot revenge plans for the years to come against him.
Along of managing to free himself from his tainting darkness, even knowing that is impossible, Yato began try to redeem himself by saving many slaves and orphans of war. After saving many people and doing many good things by stopping a lot of wars repeatedly, many humans began to worship him as their own God. To Yato's shock, many people that was saved by him began to literally follow him everywhere. As he was frenzied and annoyed when they continued to pursue him, Yato decided to settle down in a country, after claiming it as his. After rebuilding the whole Ōtake no Kuni from the very beginning, Yato became officially the King of his Country as Ōtsutsuki Takehiko.
In short amount of time Ôtake no Kuni began to be recognized as 'the Country of New Beginnings' trough the whole world, as many people settled down in there for a new start in life. After the Zenkai finally figured out that Yato himself was Ôtsutsuki Takehiko, many countries created an alliance with him. Accompanying the civilians came also many Fighters and Warriors that some of them achieved of being acknowledged by Yato. After some more passing years, Yato decided to share his Chakra permanently with all of the people that he began to see as his family and founded together the heavenly Ôtsutsuki Clan.
Some times later, a war slave boy named Kazuya was sent to Ōtake no Kuni as a spy. After two months of cat and mouse play, Yato decided to meet the very well spying boy privately in the woods. As he had expected, Kazuya was indeed forced to protect his only few precious comrades by accepting the mission. Without giving a chance for the boy to run away, as he was discovered from him rather playfully, Yato offered to Kazuya to be a part of his clan together with his comrades and a as means of getting his trust Yato let him go.
Not even a day after, as he couldn't let something like this continue, Yato went to where Kazuya came from. Afterwards of freeing him with the other war slaves one by one, Yato created a clone of himself and ordered him to take the freed slaves to his country. At the same time as they disappeared, with a Mini Tailed Beast Ball, Yato destroyed the Slave Castle from above.
After settling the former slaves to his country, along with days worth of thinking, Yato adopted Kazuya as his own son. As a result, Yato began to train Kazuya more on personal level and raised him as his true son. Because of that reason, Kazuya wasn't only the Heir of the Ōtsutsuki Clan but also the next in line to inherit the Throne of Ōtake no Kuni.
200 years later, after becoming an adult, Kazuya fell in love with a Priestess-Princess of another allied country, Saki Hirōmi. Without telling his true reason, afterwards of passing the throne to Kazuya and wedding him with Hirōmi, Yato disappeared without a trace.
400 years later, Ōtsutsuki Kaguya the Princess of Ōtake no Kuni was born as a very healthy crimson-red haired girl.
*If anyone wants to see this dōjutsu, please check in pixiv .net member_ illust. php? mode =medium& illust _id = 54307690, or wait until I finish this.