"You're insane," Amemiya Kenichi muttered, scratching his head as he looked at the weakened test subject before him. He didn't really want to torture the poor guy, but what choice did he have? This was the only source of cancer cells available.
If Amemiya Kenichi wanted to develop the Ninjutsu he envisioned, this was the only way.
"Relax, I'm not here to gouge out your eyeballs today," Amemiya Kenichi sighed, staring at the subject's bloodshot eyes.
The only thing he knew for sure was that Yang Chakra could indeed stimulate cancer cell growth. But the lab wasn't sterile enough, so the cells couldn't survive long outside the body.
To keep the experiment going, Amemiya Kenichi had no choice but to conduct live experiments. He planned to inject Yang Chakra directly into the subject's body to stimulate the cancer cells.
"Let's see... First, I'll infuse Yang Chakra into his body. Then, I need to create a detection method to quickly identify the cancer cells," Amemiya Kenichi mused, scribbling his ideas down with a pen.
Amemiya Kenichi realized that to develop his ninjutsu, he first needed to figure out how to infuse his chakra into someone else's body.
This was proving difficult. While he'd been getting used to Senju Hashirama's powerful physique, he still couldn't condense Yang Chakra and inject it into another person.
Even if he solved that, there was another crucial hurdle: how to make the Yang Chakra target cancer cells?
Normal people have cancer cells, but they don't develop into fixed tumors like in this test subject. In most people, cancer cells pop up all over the body and are quickly destroyed.
He also had to consider what to do if the person didn't have any cancer cells to begin with.
"This is too complicated," Kenichi muttered. "It'd be easier to just create a cancer cell in their body, make it grow rapidly, and control exactly where the damage happens." He slapped his palm with a sudden realization.
Kenichi realized he'd been overthinking things. There was no need for such a complicated approach. Why not just directly create a cancer cell inside the Test Subject's body?
After all, finding a cancer cell among countless normal cells wasn't easy. It was a huge task. But creating one? That was simple.
Amemiya Kenichi suddenly felt excited. This time, he didn't mess with the Test Subject's brain. Since the cancer cells were concentrated in the head, he could try creating some in the lungs instead.
He had his own ideas about how to create cancer cells. Normally, they arise when a normal cell's DNA is damaged, causing it to transform.
Of course, carcinogenic factors also play a role. For example, nicotine from smoking can cause lung cells to turn cancerous.
If the body fails to recognize and eliminate these cancerous cells, lung cancer develops.
The lungs are vital organs. We need them to breathe. Lung cancer would have a devastating impact on the body.
"Want a smoke?" Amemiya Kenichi offered a cigarette with a grin. The fact that cigarettes existed in the Hokage world was good news.
The Test Subject didn't respond, convinced this guy was completely insane. Smoking in his condition?
Amemiya Kenichi didn't mind the refusal. He knew how to extract nicotine from tobacco anyway.
He steeped the tobacco in 95% alcohol, then used lab equipment to extract the nicotine into the solution. Simple enough.
"Too bad nicotine doesn't crystallize," Amemiya Kenichi sighed. "That would make things even easier."
Liquid nicotine could be frozen, but Amemiya Kenichi didn't need to bother. He simply loaded the nicotine solution into a spray device and sprayed it onto the Test Subject's chest.
"What are you doing?" The Test Subject panicked, terrified by Amemiya Kenichi's actions. The unknown fear made him tremble violently.
"Calm down," Amemiya Kenichi said calmly. Nicotine could be absorbed through the skin. If injected directly into a vein, it could even kill.
Since nicotine is a toxin, ninjutsu like Fine Malady Extraction can directly extract it.
"Even if it can be extracted, you'd still need a Medical Ninja, right? Without one, you'd just have to tough it out yourself?" Amemiya Kenichi's eyes lit up. This could potentially be used as a method of poisoning.
Amemiya Kenichi recalled that the nicotine from twenty-five cigarettes was enough to kill an adult. But if injected directly into a vein, the nicotine from just four cigarettes would be lethal.
"But these days, injecting nicotine into someone's veins isn't exactly easy," Amemiya Kenichi mused, shaking his head. Ninjas aren't fools.
Still, Amemiya Kenichi thought it was worth noting. After all, cigarettes were easy to come by in the Ninja World, and you never knew when this knowledge might come in handy.
However, Amemiya Kenichi immediately realized a problem: ninjas in this world had far superior physical capabilities compared to people from his previous life. So, whether the nicotine from a few cigarettes was truly lethal would require experimentation.
Amemiya Kenichi focused his attention on the test subject before him. He still needed a lot of experimental data to figure out how to precisely target the lungs with nicotine.
With that in mind, Kenichi decided to give the poor guy a decent meal. He needed the subject to stay alive long enough to finish his experiments. If he kicked the bucket too soon, where would he find another test subject?
"What exactly did you do to this guy?" Orochimaru asked when he returned. He found the Hyuga bastard barely alive. If the guy wasn't still breathing, Orochimaru would have suspected his apprentice had killed him.
"Heh, I ran some experiments on him to study how those special cells in his body came to be," Kenichi said with an embarrassed smile.
Orochimaru had been gone for eight days, and Kenichi had spent all eight days experimenting. At first, the subject could still curse him out, but later he just went silent, looking completely broken.
Still, the research hadn't been a total waste. At least Kenichi could now inject Yang Chakra directly into the subject's lungs.