<ol>
<li>First of all, Suzuya did not use just any knives, he used a bikaku quinque in the form of knives, the <a href="http://tokyoghoul.wikia.com/wiki/Scorpion_1/56" rel="nofollow noreferrer">Scorpion 1/56</a>. Thus, since they are made from kagune, these knives can pierce ghoul skin and thus cut Kurona and Nashiro.</li>
</ol>

<p><a href="https://i.sstatic.net/GGVFh.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/GGVFh.png" alt="enter image description here"></a></p>

<blockquote>
  <p>Scorpion 1/56 (サソリ1/56, Sasori 1/56) is a bikaku quinque that takes the form of a switchblade. They are currently wielded by Juuzou Suzuya. It is a set of totally 56 blades which can be used both as a melee and ranged weapon.</p>
</blockquote>

<ol start="2">
<li>The CCG do use regular guns and other modern weaponry, but they are loaded with  <a href="http://tokyoghoul.wikia.com/wiki/Q_bullets" rel="nofollow noreferrer">Q bullets</a>, which are also manufactured from Kagune, thus, they can harm ghouls.</li>
</ol>

<p><a href="https://i.sstatic.net/fNp5a.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/fNp5a.png" alt="enter image description here"></a></p>

<blockquote>
  <p>Q bullets are bullets with a melted down kagune coating; however, because the material can only be acquired by ghouls, the coating itself is moderately thin.</p>
</blockquote>

<p>Therefore, in both instances, weaponry manufactured from kagune are used, which is the only known material to be able to harm ghouls without the use of RC suppressants. Now for the true answer to the question. <strong>Can a ghoul be harmed by earthly weapons?</strong></p>

<p><strong><em>Yes, yes they can, but only under certain conditions.</em></strong></p>

<p>One cause is <a href="http://tokyoghoul.wikia.com/wiki/Rc_suppressants" rel="nofollow noreferrer">Rc suppressants</a>, which effectively makes the ghouls human. Furthermore, this is available in gas form as shown by the Aogiri raid on <a href="http://tokyoghoul.wikia.com/wiki/Cochlea" rel="nofollow noreferrer">Cochlea</a> in Episode 4 of Tokyo Ghoul √A. Thus, under certain conditions, ghouls can be harmed by conventional weapons, so it is not odd for them to use such weapons. However, there has not been a single instance where conventional weapons worked in combat without RC suppressants.</p>

<blockquote>
  <p>Rc suppressants (Rc抑制液, Rc yokuseieki) are a drug used to suppress the activity of the Kakuhou. They are primarily used by the Commission of Counter Ghoul on Ghoul prisoners, for the purpose of keeping them weakened or for interrogation. It slows regeneration, impairs the Kagune, and makes their bodies vulnerable to mundane items such as knives or needles.</p>
</blockquote>

<p>But of course, as stated by <a href="https://anime.stackexchange.com/users/22203/lentinant">lentinant</a>, a strong enough force would most likely be sufficient to pierce the skin and hurt the ghouls, but kagune-based weapons are used most likely out of their effectiveness and swiftness in piercing ghoul skin than other more expensive and large impractical weapons such as a railgun or AMRs as stated by <a href="https://anime.stackexchange.com/users/20610/ryan">Ryan</a>, which are bulky and hard to maneuver against a speedy ghoul that would rush towards a sniper if there was no infantry to guard against the ghouls, these infantry would of course have to use weapons that are reliable in close combat, such as swords and knives, which need to be made of kagune to pierce the ghoul skin.</p>

<p><a href="https://i.sstatic.net/8Z593.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/8Z593.png" alt="enter image description here"></a></p>

<p>A good measurement for close combat in ghouls is Nishiki's skin scrape, which seems to only have reached the hypodermis as the blood vessels and muscle tissue can be seen. This scrape was a result of Kaneki throwing him up about 5 metres (using the van beside kaneki as about 2 metres as measurement) in about 1 second in this <a href="https://www.youtube.com/watch?v=lze7iIl12js" rel="nofollow noreferrer">video at 0.48</a>, that would mean an acceleration of about 15ms^-2 after accounting for gravity, which means 885N of force since Nishiki is 59kg, implying a pressure of 354kPa is needed to pierce the skin assuming the scrape is a square 5cm in length. This force is 3 times the pressure of the atmosphere, which clearly is difficult to exert from a human, thus, kagune based weapons are opted for by the CCG in close combat.</p>

CC BY-SA 3.0
2016-04-11T13:36:39.653Z
Don't forget about Rize being seriously wounded by metal beams on the very beginning. Not actual case of using common weapon, but one of cases when ghoul could be damaged without quinque.
lentinant
CC BY-SA 3.0
2016-04-11T15:40:00.460Z
@lentinant Agree with that point. THose beams were falling fast and hard (at least several floors worth of the building). and ofcourse are large and heavy. I bet they would be weak to Anti Tank Rifles or other super powerful weapons meant to damage tanks, but no way an ordinary human could generate the force needed.
Ryan
CC BY-SA 3.0
2016-04-12T06:46:02.433Z
@lentinant Answer modified, hope it gives a better perspective.
Astral Sea
CC BY-SA 4.0
2018-05-05T05:43:46.037Z
Just curious but how did you calculate the acceleration since the final velocity is probably not 0.
user35897
CC BY-SA 3.0
2016-04-09T09:38:06.740Z
2016-04-12T06:45:59.930Z
2017-04-13T12:54:49.117Z
Astral Sea
<p>In Tokyo Ghoul, Jason claimed, while torturing Kaneki, that a ghoul's skin can not be pierced by any ordinary metal. If so, then:</p>

<ol>
<li>How could Rei wound Kurona and Nashiro by knives?</li>
<li>Why don't the Doves use ordinary rifles and swords instead of Kagune to attack ghouls?</li>
</ol>

<p>These instances are <strong>contradictory</strong> and <strong>paradoxical</strong>. Please give an explanation which makes all these instances reasonable.</p>

<tokyo-ghoul>
Can a ghoul's skin be pierced by earthly weapons?
# Can a ghoul's skin be pierced by earthly weapons?
Posted by: username_0 on 2016-04-09
In Tokyo Ghoul, Jason claimed, while torturing Kaneki, that a ghoul's skin can not be pierced by any ordinary metal. If so, then:

1. How could Rei wound Kurona and Nashiro by knives?
2. Why don't the Doves use ordinary rifles and swords instead of Kagune to attack ghouls?

These instances are **contradictory** and **paradoxical**. Please give an explanation which makes all these instances reasonable.
**Tags:** tokyo-ghoul
---
## 1 answers
### Answer by username_1 on 2016-04-09. Score: 8 | Accepted answer
1. First of all, Suzuya did not use just any knives, he used a bikaku quinque in the form of knives, the [Scorpion 1/56](http://tokyoghoul.wikia.com/wiki/Scorpion_1/56). Thus, since they are made from kagune, these knives can pierce ghoul skin and thus cut Kurona and Nashiro.

[![enter image description here](https://i.sstatic.net/GGVFh.png)](https://i.sstatic.net/GGVFh.png)

> Scorpion 1/56 (サソリ1/56, Sasori 1/56) is a bikaku quinque that takes the form of a switchblade. They are currently wielded by Juuzou Suzuya. It is a set of totally 56 blades which can be used both as a melee and ranged weapon.

2. The CCG do use regular guns and other modern weaponry, but they are loaded with [Q bullets](http://tokyoghoul.wikia.com/wiki/Q_bullets), which are also manufactured from Kagune, thus, they can harm ghouls.

[![enter image description here](https://i.sstatic.net/fNp5a.png)](https://i.sstatic.net/fNp5a.png)

> Q bullets are bullets with a melted down kagune coating; however, because the material can only be acquired by ghouls, the coating itself is moderately thin.

Therefore, in both instances, weaponry manufactured from kagune are used, which is the only known material to be able to harm ghouls without the use of RC suppressants. Now for the true answer to the question. **Can a ghoul be harmed by earthly weapons?**

***Yes, yes they can, but only under certain conditions.***

One cause is [Rc suppressants](http://tokyoghoul.wikia.com/wiki/Rc_suppressants), which effectively makes the ghouls human. Furthermore, this is available in gas form as shown by the Aogiri raid on [Cochlea](http://tokyoghoul.wikia.com/wiki/Cochlea) in Episode 4 of Tokyo Ghoul √A. Thus, under certain conditions, ghouls can be harmed by conventional weapons, so it is not odd for them to use such weapons. However, there has not been a single instance where conventional weapons worked in combat without RC suppressants.

> Rc suppressants (Rc抑制液, Rc yokuseieki) are a drug used to suppress the activity of the Kakuhou. They are primarily used by the Commission of Counter Ghoul on Ghoul prisoners, for the purpose of keeping them weakened or for interrogation. It slows regeneration, impairs the Kagune, and makes their bodies vulnerable to mundane items such as knives or needles.

But of course, as stated by [lentinant](https://anime.stackexchange.com/users/22203/lentinant), a strong enough force would most likely be sufficient to pierce the skin and hurt the ghouls, but kagune-based weapons are used most likely out of their effectiveness and swiftness in piercing ghoul skin than other more expensive and large impractical weapons such as a railgun or AMRs as stated by [Ryan](https://anime.stackexchange.com/users/20610/ryan), which are bulky and hard to maneuver against a speedy ghoul that would rush towards a sniper if there was no infantry to guard against the ghouls, these infantry would of course have to use weapons that are reliable in close combat, such as swords and knives, which need to be made of kagune to pierce the ghoul skin.

[![enter image description here](https://i.sstatic.net/8Z593.png)](https://i.sstatic.net/8Z593.png)

A good measurement for close combat in ghouls is Nishiki's skin scrape, which seems to only have reached the hypodermis as the blood vessels and muscle tissue can be seen. This scrape was a result of Kaneki throwing him up about 5 metres (using the van beside kaneki as about 2 metres as measurement) in about 1 second in this [video at 0.48](https://www.youtube.com/watch?v=lze7iIl12js), that would mean an acceleration of about 15ms^-2 after accounting for gravity, which means 885N of force since Nishiki is 59kg, implying a pressure of 354kPa is needed to pierce the skin assuming the scrape is a square 5cm in length. This force is 3 times the pressure of the atmosphere, which clearly is difficult to exert from a human, thus, kagune based weapons are opted for by the CCG in close combat.
> **Comments:**
> **username_2** (2016-04-11): Don't forget about Rize being seriously wounded by metal beams on the very beginning. Not actual case of using common weapon, but one of cases when ghoul could be damaged without quinque.  
> **username_3** (2016-04-11): @lentinant Agree with that point. THose beams were falling fast and hard (at least several floors worth of the building). and ofcourse are large and heavy. I bet they would be weak to Anti Tank Rifles or other super powerful weapons meant to damage tanks, but no way an ordinary human could generate the force needed.  
> **username_1** (2016-04-12): @lentinant Answer modified, hope it gives a better perspective.  
> **username_4** (2018-05-05): Just curious but how did you calculate the acceleration since the final velocity is probably not 0.  
---
