Jackey Yoshikawa & His Blue Comets -- Kokoro no Niji（こころの虹）

This article has been created under somewhat unusual circumstances since the person who actually requested the lyrics for the song in question here via the Contact Form has been somewhat difficult to contact. I tried to send e-mail to him directly but it got bounced back.

First off, the song is their 11th single "Kokoro no Niji" (Blue Rainbow) by Jackey Yoshikawa & His Blue Comets（ジャッキー吉川とブルー・コメッツ）, the famous Group Sounds band of the 1960s. I hadn't heard of it before so I have to give thanks to the good man from Brazil who asked about it since the ballad is quite pleasant to the ear. Usually when I think of Group Sounds music, I think of melodies inspired by bands like The Beatles, Herman's Hermits and groups from the original British Invasion, but "Kokoro no Niji" has quite the gentle Latin vibe in its music, provided by one of the vocalists, the late Daisuke Inoue（井上大輔）under his pen name of Tadao Inoue（井上忠夫）.

The lyrics were written by Jun Hashimoto（橋本淳）and spell out a man's woes over a lost happy romance although at the end, he may be saying goodbye to all of the mourning. "Kokoro no Niji" made it as high as No. 5 on Oricon after its release in January 1968.

Anyways, the lyrics in their original form can be found at Uta-Net while underneath are the romanized words:

Anata wo shinjite, koko made kita keredo
Futari de mitsuketa niji ga mienai no

Hai iro no sora e, kanashimi wo nosete
Kayowai chouchou wa doushite kieta no

Itsuka anata to musubareta hi ni
Dakishime dakishimete
Aete ii no ne

Watashi no kokoro wa namida de yureru kedo
Kanashii chouchou wa ozora e kaeru
Kanashii chouchou wa ozora e kaeru

Actually, the person who asked me also informed me that a cover version had been performed by the Brazilian band Os Incriveis.