Sorry for not replying sooner. The title of the first song is hard to translate....."Yosakoi," the name of the Festival. It probably means (I'm not sure) either "Come see me at night." or an equivalent of "Heave ho!" The lyric (was popular in 19th century) tells a tragic love story of a monk and a girl. The very part appears in this movie says "A monk bought an ornamental hairpin at a shop by Harimaya Bridge," implying he has a sweetheart.