Kyu Sakamoto
The music genre became popular, and many composers around the world started writing letkis music. Examples of non-Finnish letkis music include "La Yenka" (performed by Johnny &amp; Charley Kurt, 1965), Gemelle Kessler's "Lasciati Baciare Col Letkis", "Leaf Fall" () by David Tukhmanov and "Ploem Ploem Jenka" by . Lindström's Letkajenkka was translated and covered in Japanese as Retto Kisu (Jenka) / レット・キス（ジェンカ）, performed by Kyu Sakamoto.