Fujin sat in his meditation room and sat in a meditative position. Soon, chakra could be seen surrounding his body. Fujin's mind was analyzing his chakra, 'Yang Yin nature… How can I segregate the two?'

As Fujin inspected his chakra, he analyzed, 'Yang Release is described as the physical energy that governs vitality, growth, and life force. Meanwhile, Yin Release is described as the spiritual energy that governs imagination, creativity, and the formation of shape and form.

If I have to compare them with techniques, then Yang Release is often connected with Taijutsu while Yin release is linked with Genjutsu. Ninjutsu needs a balance of both of them. But, when we train Taijutsu, Genjutsu or Ninjutsu, we don't feel the Yang or Yin aspects of chakra…'

Fujin clenched his fist and raised it in front of his hands as continued analyzing, 'If Yang Release is just the physical energy, then can this be considered as Yang Release? After all, it enhances my physique.'

Chakra appeared around his fist. The chakra grew larger and at the same time, Fujin's fist became stronger. Fujin's eyes widened and began glowing as he realized, 'No, the chakra on my fist is just normal chakra. After all, I haven't segregated the chakra.

But, when I focus the chakra on my fist, my fist itself becomes much more resilient. Otherwise, every time I punch something, my fist will become a bloody mess due to the recoil. The chakra that enhances my fist is the Yang aspect of my chakra!'

Fujin didn't analyze anything for a couple of minutes and let the realization sink in. Finally, he let out a sigh and muttered, "So learning Senju Taijutsu Chakra automatically teaches us Yang Release… So I have known how to use Yang Release for more than a year without knowing that I know it…"

He lowered his fist and thought, 'Sigh, you could have at least told me Renjiro. Do these guys get a kick out of keeping some details a secret? Still, to think that he taught me Yang Release. He wasn't kidding about the magnanimity of the Senju clan! No way any other clan would teach Yin or Yang release to outsiders.'

Fujin focused his chakra once again. This time, a thin layer of chakra gathered on his entire body. However, the chakra began decreasing and soon dissipated. However, chakra was still gathered in his flesh. Fujin felt that his body was much stronger.

He opened his eyes and raised his right hand in front of him. A formless chakra appeared on his palm. Fujin thought, 'This should be pure Yang chakra. Since there is no Yin chakra involved, I can't control its shape.

I guess Yoshi wasn't speaking the complete truth then. With just Yang chakra, a medical ninja won't be able to heal perfectly. They will need a little bit of Yin chakra to control the Yang chakra so that they can heal effectively.

But, since he said that we just need to keep trying until we find the right proportions, I guess that we will eventually be able to release chakra that is majorly Yang but has a bit of Yin to control it appropriately. Anyways…'

Suddenly, Yin chakra flowed into his right palm and mixed with the Yang chakra. The chakra took the shape of a ball and began rotating rapidly. Fujin analyzed, 'So in the case of Rasengan, Yang chakra is responsible for the damage while Yin chakra is responsible for the rotation and the spherical form. To think that I was able to just do it subconsciously without knowing the details. The same should be the case with every ninjutsu.'

Fujin went into the lowest basement and began experimenting with all his ninjutsus. He began studying how Yin and Yang chakra worked in every ninjutsu.

Three days later, Fujin was standing in his basement. He made a few hand signs.

'Bringer of Darkness Jutsu'

Immediately, the entire room went dark. A smile formed on Fujin's face, 'Great! The time needed to reduce this jutsu has been reduced by 3 times. Though I spent 3 days studying Yang and Yin release, it was time well spent. I will be able to improve my Ninjutsus as well. Though they wouldn't have such a huge improvement, it is still better than nothing.'

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Fujin left the basement and freshened himself up. He had barely rested for 3 days. He thought, 'Since I have learnt both Yang and Yin releases, it's time for a treat!'

Fujin spent the remaining day visiting all his favorite restaurants in Konoha until he was full!

The next day, Fujin summoned Goro and asked Goro to reverse summon him.

When Fujin appeared on Mount Muteki, Goro asked, "What do you wanna train in today?"

Fujin replied, "I want to talk with your father.

Can you take me to him?"

Goro nodded, "Sure. Climb on my majestic back!"

Goro carried Fujin on his back and flew away from Mount Muteki. En route, Fujin said, "By the way, I had a few more ideas for combination jutsus. You will love the next one."

Goro grinned and said, "I can't wait to try! Thanks to you, I have become even more amazing! I will leave both Kurogan and Kaito in the dust, hahaha!"

In a few minutes, they arrived before Ryu's humongous body. Ryu was resting, however, he opened an eye to see Goro flying towards him!

Goro landed in front of him and said, "Father, Fujin wanted to see you, so he summoned the most amazing Winged Sabertooth to help him! See ya!"

He dropped Fujin and flew away without waiting for Ryu's reply. Ryu sighed at his son's antics and muttered in a sleepy tone, "What do you want?"

Fujin replied, "I want to experience the nature chakra once again. Can you monitor me?"

Ryu asked with one eye closed, "Why do you want to experience that again?"

Fujin answered, "I am trying to learn Mystical Palm jutsu. The instructor said that we need to have a very calm and pleasant mind in order to learn it. And I felt the most calm and pleasant when we flew to Mount Muteki last time."

Ryu stared at Fujin and asked lazily, "Is Mystical Palm jutsu that healing jutsu?"

Fujin nodded.

Ryu said in the same tone, "So you want to tell me that you need to sense nature chakra in order to learn a basic healing jutsu?"

Fujin felt awkward upon hearing his question. He said, "Well, it isn't a necessity. But it will be of great help."

Ryu said, "If you keep sensing nature chakra again and again, you will inevitably begin absorbing it as well. And you aren't ready to absorb it. If you do, the only result will be your death. So stop using excuses to achieve that state once again. I know that it feels great and you would want to feel it again and again, but be patient for a few years."

Ryu closed his eye and Fujin disappeared leaving a cloud of smoke.

Fujin appeared back in his basement. A look of surprise could be seen on his face as he muttered, "Did he end Goro's summon so casually?"

He got up and sighed, 'That state felt so peaceful and heavenly. Perhaps it truly felt addictive. I guess Ryu was right in calling the reason an excuse. Oh well, I'll see how it goes in the next training session. For now, it's time to retrain my jutsus.'

Fujin went to the training ground. He began using the jutsus that he had already mastered and began using them while properly applying Yang and Yin chakras.

He decided, 'I will begin with the Infinite Breakthrough jutsu.'

He gathered chakra in his throat while segregating it into Yang and Yin. He used the Yang chakra to provide power to the jutsu and used the Yin chakra to decide the shape and range of the jutsu. Then, he exhaled a normal Infinite Breakthrough jutsu.

Fujin analyzed, 'The speed of performing the jutsu is much slower. But it's understandable as I am not doing it the normal way. I will need to keep practicing to see how much the speed will improve. If it still takes longer, then it won't be worth it.'

Fujin kept practicing. As he did, his speed increased and a smile formed on his face as he could see the benefits of this new way. He ate a soldier pill so that he could train for longer.

Soon, the skies went dark. Fujin gathered chakra once again and instinctively split it into Yang and Yin. He exhaled another Infinite Breakthrough jutsu. The jutsu travelled in a straight line like a beam with a 2-meter radius. It destroyed all trees in its path for over 100 meters!

Fujin grinned, 'Amazing! Though my speed is still a bit slower, the benefits of performing jutsus this way are just amazing! By controlling Yang chakra, I can easily decide how much power I want to put into the jutsu. If I want to supercharge it, I only have to increase the Yang chakra and don't have to increase the Yin chakra. So I can save Yin chakra while supercharging this jutsu.

However, more than Yang chakra, I am impressed by the abilities of Yin chakra. I didn't expect such a result!'

With a grin on his face, he observed his surroundings. It was a complete mess! Some trees had hundreds of holes in their trunk while some had hundreds of cuts on them. A few trees were completely shredded. If anyone visited this place, they would be terrified by the destruction!

Fujin was very happy. It was as if a whole new realm of possibilities had opened up for him. A terrifying new realm!

[A/N: Researched a lot about Yin Yang release and how to train them. Surprisingly, I didn't find any official data on it. Even the details about them are very vague. So I spent the entire day thinking about how I should include its training. Unfortunately, I couldn't come up with any better ideas. So I decided to settle on what I wrote above. I will likely not create any new jutsu that uses only Yang or Yin chakra but instead use them to modify and amplify other jutsus to make them more versatile.]