The reason some of the characters are assigned with a number is because the way their name is pronounced in Japanese are the same with pronunciation the Japanese numerical / counting system.

**STANDARD** counting system:

0 = Zero / O

1 = Ichi / I (pronounced “ee”)

2 = Nii

3 = San

4 = Yon / Shi

5 = Go

6 = Roku

7 = Nana / Shichi

8 = Hachi

9 = Kyuu / Kuu

10 = Jyuu

**OLD counting system:**

0 = Rei

1 = Hi

2 = Fu

3 = Mi

4 = Yo

5 = Itsu

6 = Muu

7 = Nana

8 = Ya

9 = Kono

10 = To

**pronounced**: hee, foo, mee, yoh, itsu-oo, moo, nana, yah, koh-noh, toh

**count objects** in Japanese: ‘hi’totsu, ‘fu’tatsu, ‘mi’ttsu, ‘yo’ttsu, etc.

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**Sawada Tsunayoshi**. Simple down to Tsuna. 2 is Tsu while 7 is NANA in japanese. NA is short for nana so TSU-NA becomes 27.

**Hibari Kyoya**. Simple down to Hiba. HI is 1 in OLD Japanese counting system while 8 is Ba. So HI-BA becomes 18.

**Mukuro Rokudo** is little tricky. There are several ways you can do this one. Roku is 6 in the counting system which can be shortened to ro. Ku is 9. Ro-ku is 69. But you can also use his first name. Mukuro. Mu is 6 in the OLD counting system while ku is 9 in the current one. Mu-ku becomes 69. Some people prefer to use 696 (Mu-Ku-Ro).

**Gokudera Hayato**. Shorten down to Goku. 5 is GO in Japanese while 9 is KU. GO-KU becomes 59.

**Yamamoto Takeshi**. Shorten down to Yama. This one is a little tricky too. YA is 8 in the OLD Japanese counting system. While MA isn’t included in system. So you might be wondering how everyone came up with 0. Well zero usually known as Rei is sometimes called “Maru” which basically means a circle that looks like a zero. So if we take the first syl. then it becomes MA. YA-MA becomes 80.

**Byakuran’s** number is 100. The romaji number for 100 is Hyaku. Hyaku > Byaku. So Byakuran is 100.

The correct romaji for **Chrome Dokuro** is Dokuro Kuromu. Which would be shortened to Kuro. Ku = 9 while Ro = 6 which becomes 96.

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**Ten Years Later:**

1027 = TYL Tsuna

1059 = TYL Goku

1080 = TYL Yamamoto

1069 = TYL Mukuro

1018 = TYL Hibari

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Names that can’t be assigned with number is assigned with character’s name’s first letter.

G = Giotto

L = Lambo

D/Boss = Dino

R = Reborn

3/X = Xanxus

39/S = Squalo

SP = Spanner

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**Pairings: **

Hibari x Tsuna will be 1827

Yamamoto x Gokudera will be 8059

Dino x Hibari will be D18

So when you put two character numbers together it’s makes pairing.

**The set of numbers which comes first shows who’s the seme.*

*———————*

This can also be applied to other fandoms.

**Shizuo (Durarara!!)**. 4 is shi, 2 is fu (similar to zu) in the OLD counting system, and 0 is just o. Therefore, Shi-zu-o (420)

**Izaya (Durarara!!)**. 1 is i, 3 is san (can be changed to sa / za), and 8 is ya in the OLD counting system. Therefore, I-za-ya (138)

Shizaya becomes 4213 (somehow)