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I will show all units of counting in Japanese below.
The units which are most often used in daily life are shown in the olive green section.
The etymology of these units stems from Buddhism.
This is the first time I have encountered some of the more exotic units shown below.
| 0 
  REI
 or
 ZERO
 | 1 
  ICHI
 | 2 
  NI
 | 3 
  SAN
 | 4 
  YON
 or
 SHI
 | 5 
  GO
 | 6 
  ROKU
 | 7 
  NANA
 or
 SHICHI
 | 8 
  HACHI
 | 9 
  KYUU
 |  
| 10 
  JUU
 | 11 
   JUU ICHI
 | 12 
   JUU NI
 | 13 
   JUU SAN
 | 14 
   JUU YON
 or
 JUU SI
 | 15 
   JUU GO
 | 16 
   JUU ROKU
 | 17 
   JUU NANA
 or
 JUU SHICHI
 | 18 
   JUU HACHI
 | 19 
   JUU KYUU
 |  
| 20 
   NIJUU
 | 21 
   NIJUU ICHI
 | 22 
   NIJUU NI
 | 23 
   NIJUU SAN
 | 24 
   NIJUU YON
 or
 NIJUU SHI
 | 25 
   NIJUU GO
 | 26 
   NIJUU ROKU
 | 27 
   NIJUU NANA
 or
 NIJUU SHICHI
 | 28 
   NIJUU HACHI
 | 29 
   NIJUU KYUU
 |  
| 30 
   SANJUU
 | These numbers are formed the same way as the numbers shown above. |  
| 40 
   YONJUU
 |  
| 50 
   GOJUU
 |  
| 60 
   ROKUJUU
 |  
| 70 
   NANAJUU
 |  
| 80 
   HACHIJUU
 |  
| 90 
   KYUUJUU
 |  
| 100 
  HYAKU
 | 101 
   HYAKU ICHI
 | 102 
   HYAKU NI
 | 103 
   HYAKU SAN
 | 104 
   HYAKU YON
 | 105 
   KYAKU GO
 | 106 
   HYAKU ROKU
 | 107 
   HYAKU SHICHI
 | 108 
   HYAKU HACHI
 | 109 
   HYAKU KYUU
 |  
| 1,000 
  SEN
 | 10,000 
  ICHI MAN
 | 100,000 
   JUU MAN
 | 1,000,000 
   HYAKU MAN
 | 10,000,000 
   ISSEN MAM
 (Not ICHI SEN MAN)
 |  
| 100,000,000 
  ICHI OKU
 | 1,000,000,000 
   JUU OKU
 | 10,000,000,000 
   HYAKU OKU
 | 100,000,000,000 
   ISSEN OKU
 (Not ICHI SEN OKU)
 | 1,000,000,000,000 
  ICCHOU
 (Not ICHI CHOU)
 |  
| 
In Japanese, the unit changes every 4 digits.
| 
| 10,000 : | MAN |  |  
| 100,000,000 : | OKU |  |  
| 1,000,000,000,000 : | CHOU |  |  |  | EX. 1,356,269,709,548
 ICCHOU
 SANZEN GOHYAKU ROKUJUU NI OKU
 ROKUSEN KYUUHYAKU NANAJUU MAN
 KYUUSEN GOHYAKU YONJUU HACHI
 
 ( 3,000 is SANZEN. Not SANSEN )
 |  |  
| 100,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 : | MURYOUTAISUU |  |  
| 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 : | FUKASHIGI |  |  
| 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 : | NAYUTA |  |  
| 100,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 : | ASOUGI |  |  
| 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 : | GOUGASYA |  |  
| 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 : | GOKU |  |  
| 100,000,000,000,000,000,000,000,000,000,000,000,000,000,000 : | SAI |  |  
| 10,000,000,000,000,000,000,000,000,000,000,000,000,000 : | SEI |  |  
| 1,000,000,000,000,000,000,000,000,000,000,000,000 : | KAN |  |  
| 100,000,000,000,000,000,000,000,000,000,000 : | KOU |  |  
| 10,000,000,000,000,000,000,000,000,000 : | JYOU |  |  
| 1,000,000,000,000,000,000,000,000 : | JYO |  |  
| 100,000,000,000,000,000,000 : | GAI |  |  
| 10,000,000,000,000,000 : | KEI |  |  
| 1,000,000,000,000 : | CHOU |  |  
| 100,000,000 : | OKU |  |  
| 10,000 : | MAN |  |  
| 1,000 : | SEN |  |  
| 100 : | HYAKU |  |  
| 10 : | JYUU |  |  
| 1 : | ICHI |  |  
| 0 : | REI |  |  
| 0.1 : | BU |  |  
| 0.01 : | RIN |  |  
| 0.001 : | MOU |  |  
| 0.000,1 : | SHI |  |  
| 0.000,01 : | KOTU |  |  
| 0.000,001 : | BI |  |  
| 0.000,000,1 : | SEN |  |  
| 0.000,000,01 : | SHYA |  |  
| 0.000,000,001 : | JIN |  |  
| 0.000,000,000,1 : | AI |  |  
| 0.000,000,000,01 : | BYOU |  |  
| 0.000,000,000,001 : | BAKU |  |  
| 0.000,000,000,000,1 : | MOKO |  |  
| 0.000,000,000,000,01 : | SYUNJUN |  |  
| 0.000,000,000,000,001 : | SYUYU |  |  
| 0.000,000,000,000,000,1 : | SYUNSOKU |  |  
| 0.000,000,000,000,000,01 : | DANSHI |  |  
| 0.000,000,000,000,000,001 : | SETUNA |  |  
| 0.000,000,000,000,000,000,1 : | RITTOKU |  |  
| 0.000,000,000,000,000,000,01 : | KUUKYO |  |  
| 0.000,000,000,000,000,000,001 : | SEIJOU |  |  
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