The theme song for Merit’s commercials. A popular jingle.
Since its release in 1970, Merit shampoo has been beloved as Kao’s flagship product.
Over the years, many commercials have been produced, featuring a wide variety of songs as CM tracks.
Some were original songs created specifically for the commercials, others used popular hits, and more recently, cover versions of iconic Japanese rock songs have also drawn attention.
In this article, we’ll introduce all the songs that have been featured in Merit commercials to date!
- Shampoo commercial song. Popular jingle.
- Kao’s commercial song. A popular jingle.
- A roundup of Merit commercials: the charm lies in their portrayals of family love!
- Catchy Showa-era commercial jingles. Introducing famous songs recently featured in commercials, too!
- [From timeless classics to the latest hits] A roundup of catchy commercial songs
- [Nostalgic Commercials] A compilation of commercials that aired in the Showa era
- [Taisho Pharmaceutical CM Songs] Popular Commercial Songs and Historical Commercial Song Collection [2026]
- Shiseido commercial song. Popular commercial jingle.
- Classic enka songs featured in commercials, along with original CM tracks, introduced together!
- Pocky commercial songs: a comprehensive introduction to the CM tracks through the years
- [Piano Pieces from Commercials] Introducing Moving Masterpieces That Resonate with the Heart
- Essential’s commercial jingle. A popular commercial song.
- From Refreshing Tunes to Moving Songs: A Compilation of Detergent and Fabric Softener Commercial Tracks
Merit commercial songs. Popular commercial songs (21–30)
The Theory of HappinessShiina Ringo
Titled “The Day I Cooked for the First Time,” this commercial depicts, in softly drawn illustrations, a child taking on the challenge of cooking with their mother for the very first time.
Watching it likely brought back memories of your own first attempt at cooking.
The series features its signature touch: children’s voices singing ‘Koufukuron’ (A Theory of Happiness).
The original song was Shiina Ringo’s debut single, released in 1998.
Its lyrics—chronicling the earnest struggle to protect someone precious—are captivating, and many people were moved by them at the time of release and continue to be moved even now.
