うららか is a poetic Japanese adjective describing a clear, gentle, pleasantly warm day, often associated with the feeling of spring. In this song, it takes on a romantic meaning as the couple vows to move into the future together with a peaceful, radiant love, making it a memorable word that captures the song's atmosphere.
Da-iCE took a word that usually describes a calm, sunny spring day and turned it into a promise. うららか means bright, mild and peaceful, and here it is how the singer wants this relationship to feel forever: "うららかにずっと" (Brightly and calmly, always). He opens by choosing the person over destiny, which is a sweet little flex: "運命より 君と選ぶ今日がいい" (Better than fate is the today I choose with you).
The lines I like most are the small, slightly embarrassing ones. He reacts to every word she says with "一喜一憂", an idiom for swinging between joy and worry over each tiny thing, and he notices that their favourite views and even their verbal habits have started to match. Then the chorus goes full wedding vow: "健やかな愛も 病める愛でも" (In healthy love and in sick love too) is lifted straight from the Japanese version of "in sickness and in health". There is also a cute pun in "アイも変わらずに", where アイ sounds like 愛 (love) and the phrase 相変わらず means "as always". Is it a bit much? Sure. But closing on "百年後も僕と" (With me, even a hundred years from now) makes it hard not to smile.
Da-iCE formed in January 2011 under the name Blackout and became Da-iCE before their major-label debut, Shout It Out, in January 2014. The five members split the work: Yudai Ohno and Sota Hanamura are the two vocalists, while leader Taiki Kudo, Toru Iwaoka and Hayate Wada are the performers.
Their single Citrus won the Grand Prix at the 63rd Japan Record Awards in December 2021, ten years into their career. They moved from Universal Sigma to Avex Trax in 2020, and in 2022 they voiced the boy band 4*Town in the Japanese dub of Pixar's Turning Red.