VA: なぎら健壱 Nagira, Kenichi (real name: 柳楽健)

Kouichi Uehara is a fourth grade student living in the suburb of Tokyo. One day, he picks up a large stone which turns out to be a fossil of a baby "Kappa" sleeping underground for the past 300 years, and names it "Coo". Koichi and Coo become good friends and starts living with his family. However, Coo could not adjust to the life style in Tokyo and starts to miss his family. On a hot summer day, Koichi and Coo decide to go on an adventurous road trip to find his peers. <br><br>
(Source: AniDB) 

Italian voice actor who is also known for having voiced Dominic Santiago in the video game series Gears of War  and Nathan Drake in Uncharted.

Coo's Father