TVXQ
One Piece ending song "Asu Wa Kuru Kara"
One Piece opening song "We Are!"
One Piece opening song "Share The World"
Yo-Kai Watch: "Forever Friends" theme song "Daisukidatta"
Cinnamon the Movie theme song "Together"
Origami Warriors opening song "Free Your Mind"
Origami Warriors ending song "Love is All I Need"
Younha
Jyu Oh Sei ending song "Te Wo Tsunaide"
Rideback ending song "Kioku"
Kiba opening song "Hakanaku Tsuyoku"
Bleach ending song "Houki Boshi"
BoA
Inuyasha ending song "Every Heart"
Fairy Tail opening song "Masayume Chasing"
Monkey Typhoon opening song "Beside You"
Jaejoong
Zoids Wild opening song"Defiance"
Runway de Waratte ending song "Ray of Light" *going to be released on 10th January*
KARA
Naruto ending song "Butterfly"
Secret
Naruto SD ending song "Twinkle Twinkle"
2PM
Ao No Exorcist ending song "Take Off"
A Pink
Rilu Rilu Fairilu opening song "Brand New Days"
FT ISLAND
Toriko ending song "Satisfaction"
Ozuma opening song "Neverland"
CNBLUE
Supernatural ending song "In My Head"
MBLAQ
Beelzebub opening song "Baby U!"
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TVXQ is no joke in Japan, having three songs from the One Piece anime that is the most popular and Japanese anime and quizzes in history. Talk about how big they are in Japan.
PD: APink has two anime song:
2017: Papipupepon opening song Rilu Rilu Fairilu
2016: Brand New Days opening song Rilu Rilu Fairilu
Song of a series of fairies for those who were considered fairies in Korea.