Oh goodness.
Japanese Pokemon music:
"Hitoribocchi ja Nai" (You Are Not Alone)
"Sora ga Aru kara" (Because You've Got the Sky)
"Chiisaki Mono" (Just a Little Thing)
"Spurt"
Hmm... from the soundtrack of Spirited Away we have
"Itsu mo Nando demo" Always, no Matter How Many Times It's Been
"Ryuu no Shounen" Dragon Boy
Other J-pop including
"Shiawase ni Tsuite Honki Da->-bleeped-<-e Kangaete Mita" (So I Tried and Gave This "Happiness" Thing Some Serious Thought)
"Kimi to Iu Hana" (The Flower You Are)
And let's not forget, by Japanese novelty music sensation Briefs and Trunks
"Convenience Store"
"Pechapai" (Lil'tits)