1. どれだけ君を 愛していたか知って もう二度とは 増やせない思い出を 抱いて 生きて

Romaji: doredake kimi o / aishiteita ka shitte / mou nidoto wa / fuyasenai omoide o / daite ikite

Cultural Nuance: Only after you were gone did I realize the true depth of my love. Now, I will live my life holding onto the "past memories" that I can no longer add to.

🗣 Japanese Insight: The phrase "Fuyasenai omoide" (memories that cannot be increased) encapsulates a profound sense of irreversible loss. However, this is not a declaration of despair; rather, it is a vow to live on by "holding" (daite) those remaining memories like a precious treasure. The rapid, intricate phrasing (16th notes) in the verse realistically conveys the fluttering of a heart and the confusion of sudden grief.

2. デイバイデイ どんなスピードで 追いかけたら また君と 巡り逢えるだろう

Romaji: dei bai dei / donna supiido de / oikaketara / mata kimi to / meguriaeru darou

Cultural Nuance: As the days pass by, at what speed must I move to catch up with you and meet you once again?

🗣 Japanese Insight: At the start of the chorus, there is a sense of liberation as if one's field of vision has suddenly widened. The word "Meguriaeru" (to meet again) carries a more fateful nuance than a simple "meet again" (saikai); it suggests a miraculous reunion where two people are drawn back together by destiny within the vastness of the universe.

3. いつもココロで 想い続けてる まだ僕の 声は聴こえてる？

Romaji: itsumo kokoro de / omoi tsuzuketeru / mada boku no / koe wa kikoeteru?

Cultural Nuance: I am always thinking of you in my heart. Even now that we are apart, I wonder if the "voice of my heart" is reaching you.

🗣 Japanese Insight: This phrase specifically reflects the telepathic premise of the drama. Just as Teo’s thoughts were unreadable to Yuri because they were in Korean, he now wonders if she is still thinking of him or if she can still "receive" his inner voice across the physical distance. It is a poignant, fragile hope expressed as a lingering question.

4. 囁けばさ 届けられた距離 ゼロセンチの 指先で渡せた気に なってた

Romaji: sasayakeba sa / todokerareta kyori / zero senchi no / yubisaki de wataseta ki ni natteta

Cultural Nuance: When we were so close that a whisper could reach you—at a "distance of zero centimeters" where our fingertips touched—I was under the illusion that all my feelings were being conveyed.

🗣 Japanese Insight: To understand "ki ni natteta" here, one must know the two sides of the Japanese phrase ki ni naru. The first is "to be worried or interested in something." The second is "to be under the impression or to have the intention that something is a certain way, even if it isn't actually true." This lyric uses the latter; it drips with regret, realizing that he had mistakenly assumed physical proximity meant emotional transparency, neglecting to put his feelings into actual words.

5. 幾億年の 距離をこえて 輝きを伝う 星のように

Romaji: ikuokunen no / kyori o koete / kagayaki o tsutau / hoshi no you ni

Cultural Nuance: Like the light of a star that travels for hundreds of millions of years across an unimaginable distance to reach Earth, I want my love to travel through time and space to reach you.

🗣 Japanese Insight: Starlight continues to reach Earth even if the star itself has already burned out. The metaphor "Hoshi no you ni" (like a star) symbolizes the theme of "unchanging love"—the idea that once love is emitted, it never disappears but continues its journey across the cosmos, regardless of whether the two people are together or apart.

6. 君が迷子に ならないように 瞬きもせず 照らして 待ってる

Romaji: kimi ga maigo ni / naranai you ni / matataki mo sezu / terashite matteru

Cultural Nuance: So that you don't get lost in this vast world, I will keep shining my light to wait for you, without even blinking for a single second.

🗣 Japanese Insight: The expression "Matataki mo sezu" (without even blinking) conveys an unwavering, absolute devotion. It represents the will to become a guiding light (like a lighthouse or a star) for the other person. Here, the word "Matteru" (waiting) does not sound like a lonely, passive act, but rather a powerful, active choice based on deep affection.

7. どれだけの 時が流れても 永遠に過去形に ならない「 I Love You」

Romaji: doredake no / toki ga nagaretemo / eien ni / kakokei ni naranai / I Love You

Cultural Nuance: No matter how much time passes, my words "I love you" will never become the past tense "I loved you."

🗣 Japanese Insight: By using the grammatical term "Kakokei" (past tense), the lyric vividly declares that this love is eternally in the "present continuous" tense. While many love songs wallow in the memories of "having loved" someone, this concluding statement provides the listener with an overwhelming sense of certainty: this love is happening now, and it will continue forever.

🎤 Emotional Summary

Omoinotake’s "Ikuokukounen - Billions of Light-Years" is a grand anthem that likens human thought to starlight, singing of how love can be eternal and unchanging across time and space.

The explosive energy of the chorus, starting with the phrase "Day by Day," combined with the meticulously placed internal rhymes, creates a cathartic experience that carries the listener's emotions to the edge of the universe. Against the backdrop of the drama’s telepathic premise, it is a desperate cry to deliver one’s "inner voice" across any barrier. Even if you are not side-by-side right now, the light of love emitted will reach across billions of light-years and will never become a thing of the past. That confident voice lights an inextinguishable spark in the hearts of all who cherish someone special.