Shiina Ringo cover songs

Shiina Ringo, a Japanese pop star who manages to be one of my favorite artists, impresses me in a few ways.
She released a double-CD of cover songs, most of which I'd never heard before. After some research, I was impressed with what was done with two example songs:

A Japanese bubbly pop song from the 1970s, Momen no Handkerchief, performed by Hiromi Ohta, managed to get transformed into a compeletly-authentic sounding indie song, back in the early part of the 2000s. See Shiina's version here.

Apparently, a traditional tune, Uña Ramos's "Aquellos ojos grises", performed here by some Japanese folk musician types, became Ringo's Haiiro no Hitomi.

For further information on Shiina Ringo, check out this great wiki: Shiina on theppn