Sunao na Niji (素直な虹)

Child time-of saw rainbow (object), now look-up when, seven-colors isn't

In Japan rainbows are conventionally counted as 七色 ('seven colors') just like in the West. The line plays with the gap between innocent perception and adult vision — same rainbow, different reading.

Soon fog (subject) settle, time (topic) passing, keep-changing

霧がかかる ('fog hangs over') is a stock phrase for mountains, valleys, and metaphorically for memories or feelings — something that obscures clarity over time.

You (object) even-search, anywhere not-be

どこ + も + negative = 'nowhere' (similar to 誰も + neg = 'no one'). Question word + も is the universal-negation pattern.

Eye (object) close, heart open, again gaze-try-even, anything doesn't-change (question), want-to-try-confirming

Verb-て + みる ('try doing X / do X and see'): 眺めてみる ('try gazing'), 確かめてみる ('try to confirm'). Adding たい makes it 'want to try'. The doubled 〜てみてみたい is a stack of explorations.

Honest into could-become if, this fog (subject) clears (quote), heart in wish thus screaming

素直 ('honest, frank, candid') is a key Japanese-virtue word — applies to children who admit fault, lovers who confess, students who accept correction. 素直になれない ('can't be honest') is a J-pop staple lament.

Something (object) lose-completely (past), thing-by, yes obtained things also surely must-exist

失くす vs. 失う: same meaning ('to lose'), 失くす is more colloquial, 失う more formal. The line's structure ことで ('by means of / because of') marks the loss as a CAUSE of the gain.

But still, we (topic) adult by, be-confused, keep-on-living

戸惑う ('be confused, lost') is what you do when you don't know which door (戸) to pick — perfect for the in-between feeling of becoming an adult. 大人に戸惑う ('be confused by adulthood') is a precise emotion only Japanese has a single phrase for.

Rain (subject) stop when, suddenly you, pedestrian-overpass onto, climb

歩道橋 ('pedestrian overpass') = 歩道 (sidewalk) + 橋 (bridge). The Japanese street fixture is concrete, with a railing — perfect for a stop-and-look moment after a city rain.

Sky (object) pointing, innocently was-laughing

無邪気 (literally 'no evil-spirit') = 'innocent, naive, child-like' — purely positive. The kanji 邪 means 'evil/wrong'; 無邪気 is the absence of that. Used for children, animals, pure smiles.

Fade-away-like, translucent rainbow (object), anything can't-say in-state, was-gazing (tag)

消え入る (literally 'fade-enter') is a poetic verb for fading into invisibility — used for voices, smiles, light. 透けた虹 ('a transparent rainbow') is the song's signature image — a rainbow that you can almost see through, almost gone.

Truth (topic), that time, the-whole-time, your profile (object) look thing into, was-absorbed

夢中になる ('to become absorbed / transfixed') comes from 夢 (dream) + 中 (middle) — being lost in a dream-state. The line lands the song's twist: he wasn't watching the rainbow, he was watching her.

Won't-forget for

Honest into without-being-able-to-become, just your name (object), heart's-inside in, screaming

You (object) lose even, want-to-obtain things such-as don't-exist should-be even-though

〜まで can mean 'until' or, more emphatically, 'even/going so far as'. 失ってまで ('even at the cost of losing') = 'even if it means losing'. Used for sacrifices.

Weakness's back-into-make, ran-off (nominalized) (topic), yes you-side isn't, me-side is (emphatic)

背にする ('to put X at one's back') is the literary phrase for 'with X behind one' — 山を背にする ('with the mountains behind'), 弱さを背にする ('with weakness at one's back'). The line is the song's confession: he was the coward.

Honestly feelings convey because, honest rainbow (object) try-drawing because

Title-line: 素直な虹 ('an honest rainbow'). The song closes by promising to make a rainbow that DOESN'T fade or get foggy — built from honest words instead of avoidance.