Update README.md

README.md

@@ -29,6 +29,7 @@ Thank you!
 | hr-HR   | Croatian             | [@boljsa](https://github.com/boljsa)                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
 | id-ID   | Indonesian           | [@danangtomo](https://github.com/danangtomo), [@harysetyopermadi](https://github.com/Harysetyopermadi), [@rioarjuna](https://github.com/Rarj) and [@haikalrr](https://github.com/haikalrr)                                                                                                                                                                                                                                                                                                                  
 | it-IT   | Italian              | [@pippo73](https://github.com/pippo73), [@zurdyo](https://github.com/zurdyo), [@archetipo95](https://github.com/archetipo95), [@penguinFSS](https://github.com/penguinFSS) and [@vitotassplayer](https://github.com/vitotassplayer)                                                                                                                                                                                                                                                                         
+| ja-JP   | Japanese             | [@riolove1](https://github.com/riolove1))
 | ko-KR   | Korean               | [@kangjung](https://github.com/kangjung)                                                                                                                                                                                                                                                                                                                                                                                                                                                                
 | mk-MK   | Macedonian           | [@Pitr44](https://github.com/Pitr44/) and Ivan Fonchev                                                                                                                                                                                                                                                                                                                                                                                                                                                      
 | my-BM   | Melayu               | Abdul Muhaimin Che Sohor