Japan
File:Flag of Japan.svg Japan first participated in Season 1 of Melodia Song Contest and have participated a total of 7 times. They have not won the contest before.
Participations
| Edition | Delegation | Song | Artist | Grand Final | Semi-Finals | |||
|---|---|---|---|---|---|---|---|---|
| # | Location | Place | Points | Place | Points | |||
| 01 | File:Flag of Argentina.svg Buenos Aires | blueythesharkie | "終点の先が在るとするならば" | TUYU | 9 | 56 | No Semi-Finals | |
| 02 | File:Flag of Switzerland.svg Lugano | blueythesharkie | "Dynasty" | Rina Sawayama | 6 | 71 | ||
| Did Not Participate, Season 3 | ||||||||
| 04 | File:Flag of France.svg Saint-Denis | TNG | "Karanokokoro" | Anly | 11 | 51 | No Semi-Finals | |
| 05 | File:Flag of United Kingdom.svg Reading | eurofan98 | "Click" | ME:I | 17 | 46 | ||
| 06 | File:Flag of France.svg Belfort | blueythesharkie | "Ego Eimi" | BlackY, Risa Yuzuki | 25 | 25 | ||
| 07 | File:Flag of Türkiye.svg Istanbul | littleduckiie | "Tokyo Calling" | ATARASHII GAKKO! | 8 | 65 | ||
| 08 | File:Flag of Germany.svg Hamburg | eurofan98 | "MANINGEN" | ATARASHII GAKKO! | 22 | 36 | ||
| Did Not Participate in Season 9-Season 10 | ||||||||
| 11 | File:Flag of Brazil.svg Rio de Janeiro | blueythesharkie | "Be A Flower" | Ryokuoushoku Shakai | 5 | 118 | 4 | 86 |
| Did Not Participate in Season 12-Season 13 | ||||||||
| 14 | File:Flag of Sweden.svg Stockholm | itsme_notme | "PANORAMA" | Hayley Kiyoko | 9 | 98 | 8 | 69 |
| 15 | File:Flag of Gibraltar.svg Gibraltar | itsme_notme | "Honeycrash" | SASAMI | 16 | 76 | 11 | 48 |
| 16 | File:Flag of South Korea.svg Seoul | blueythesharkie | "Just Wanna xxxx With You" | Phantom Siita | 16 | 78 | 9 | 69 |
| Did Not Participate in Season 17-Season 19 | ||||||||
| 20 | File:Flag of Malaysia.svg Malacca | vasco.dot | "QUEEN" | LiSA | ||||
