During the verses, the members of Kanjani Eight can be heard rambling in the background by either laughing, talking, verbally fighting, or responding to the lyrics of the song.

After the instrumental break, Ryo Nishikido sings the chorus as a solo, with only a keyboard playing chords faintly in the background.

This is tied in full circle with the chorus, " Suddenly our hands are together / Hey, look at that / They're fusing / We'll forever hope / That our laughter / will always be there every day ".

[8] The coupling B-side, " Ukiyo Odoribito ", takes on a totally different sound and mood compared to the A-side, " Wonderful World ".

Shibutani and Nishikido opens up the song with solo verses against a swing drumbeat and a guitar riff.

Tadayoshi Ohkura, Ryuhei Maruyama, and Yasuda then take the song into the chorus with duets.

Shibutani and Ohkura duet the bridge and Nishikido sings a solo into the second chorus before the instrumental break.

The scene changes to Kanjani Eight singing in fluorescent colored flower print outfits to the opening of the song, goofing off and playing around with everything in an auto shop.

The video returns to the woman arriving at the auto shop, revealed to be named " Wonderful World ", bringing in her broken van in for repair.

The video ends with the band giving her back her repaired car and presenting her with various gifts of their love.

The final moment of the video is of the easter egg provided in the Regular Edition of the single's release.

Thus, it was requested that creating a bubblegum pop look was no good and instead wanted to go with a more manly, sweaty, oily feel.

NARRA DESIGN then spent time going over props, from size to colors, to fit the right image requested by production team.

They also mention the endless number of times it took to get the right font and size for the 'Wonderful World' sign board that hung in the garage.

[16] Wonderful World debuted at number one on the Oricon Daily Singles chart with a total of 101,088 units sold.

[17] In its second say of sales, it continued its strong trend on the charts selling an additional 81,725 units and maintaining its number one position.

[3][4] The song was also used as the ending theme to their variety show on TV Asahi titled Bōken Japan!

The regular edition CD cover displays each member displaying their character's trademark characteristics, such as Shibutani sitting on top of the Volkswagen Type 2 pointing a gun Murakami holding a pot, alluding to his weapon which is a butterfly knife converted into a fork.