Okada's Five-Lines Skink aka Far Eastern Skink, commonly known as the Japanese Skink (Piestiodon Lastisctatus in Latin or Okada-Tokage in Japanese)
The adults tend to loose the blue tail coloring and lines, while the younger one have the golden striped body and blue tinted tail as the artist has depicted.
Typically these live on the Izu islands and Izu Peninsula. They are currently a stable species on the majority of the Izu Peninsula, with a sub-population in decline on Miyake-jima, Hachijō-jima and Aogashima islands due to predation from introduced Japanese Weasles, brought in for rat control, and as such are on the Japanese Red List for those islands.