- ヒット曲集
"Hit Kyokushuu" is used on Columbia albums to indicates a vocal album with normally 10 tracks. So, in that cases, is correct to think that Hit Kyokushuu is a song collection and not a generical piece-of-music collection. Columbia has released two (or more?) albums where Hit Kyokushuu is also translated as "HIT SONGS":
https://vgmdb.net/album/71440
https://vgmdb.net/album/83184
According with this translation I suggest to translate ヒット曲集 on Columbia albums as "Hit Songs", or show the original "Hit Kyokushuu" and the "Hit Songs" in the other lines.