Horetaze ! ! NAGAIMO

Do you know about "Nagaimo" (Japanese yam)?
Nagaimo from Tokachi is renowned for its exquisite taste, loved not only in Japan but also by people all over the world.
A song has been created to support this Nagaimo.
Sung by the Star Nanda Kenji, with lyrics by Sayo comachi, composed by Omachiman, and arranged and recorded by Hiroyuki Murata, the Golden Trio.
Although it's from Tokachi, why is it Spanish?
And why does it sound like someone else is participating when it's supposed to be a solo song?
Could it be that the sliminess of Nagaimo is making my mind go round and round like Tontoro?
One thing's for sure, the combination of the song and Nagaimo is addictive.
Please listen to the song while gently stroking Nagaimo.