|Alias||"Kucchi" (by Masoh)|
|Birthday||June 30 (Cancer)|
|Relatives|| Sumi (wife, deceased)
Kuchiba is a character in Children of the Whales. He is one of the Unmarked of the island, and works as an aide to the mayor.
When he was younger, he was one of the candidates to become the island's mayor.
Taisha - He has been in love with her for a long time. However, due to her position as Mayor, she would be unable to requite his feelings even if she knew of his love for her.
Sumi - Against his will, the Committee of Elders pushed for Kuchiba to marry Sumi due to her frail health. He didn't like her showing affection to him at first, but that seemed to change after she revealed to him that she too loved Mayor Taisha.
- Kuchiba is named after a Japanese color translated as "decayed leaf brown."
- During the first attack by Skyros on the Mud Whale, his right arm was injured, leaving him unable to use it. 
|Mud Whale||Chakuro | Lykos | Sami | Suou | Taisha | Kuchiba | Shinono | Masoh | Ouni | Kicha | Ginshu | Shuan | Siena | Hakuji | Lasha | Kogare | Kikujin | Miru | Shikoku | Shikon | Nibi | Neri | Aima | Byakuroku | Dyo | Ekato | Miden|
|The Empire||Orca | Liontari | Arachni | Itia | Atsali|
|Kingdom of Siderasia||Rochalizo | Dictis | Adihilas | Palamesosu | Daktila|
|Other||Olivinis | Kokalo | 王子 | 宮廷道化師 | 国王 | 女道化師|