Lyrics, arrangement, and everything under the sun by Miyavi
Romaji lyrics by Yilei (Me)

Happy Wedding

Omedetou, kimi ni okuru tabidachi no uta wa,
Arigatou, aishita kimi e no owakare no uta sa. (Bye bye)*

Moshi kondo umare kawattemo chance wa kuru kana...nante (laugh)**
Hanamukokun, sono toki made shoubu wa oazukesa.

Toki ni wa surechigau koto mo aru darou, kenka suru yoru mo sorya kuru darou.
Soredemo futari isshoni ireba samishiku wa nai deshou? Nee

Omedetou, kimi ni okuru tabidachi no uta sa.
Arigatou, tomo ni sugoshita takusan omoide yo.

Sorya kirei ni kimatteru deshou, boku no horeta hito da mono (laugh)**
Oniawanai na noga shaku ni sawaru kedo...honto, kirei da yo.

Kimi to no tanoshikatta omoide mo, kenka bakari shita nigai omoide mo,
Ima de wa kirei na sepia iro.
Namida ni ukabete sotto sayonara shiyou.

Mou tsutaeru koto wa dekinakunachatta keredo, ima mo mune no oku ni shimatte aru yo.
Ano toki ienakatta I love you.

Itsu no hi mo wasurenaide, deatta hi no koto.
Kenka shitanara, omoidashite hatsu date no koto (laugh)**

Mou ichido iu yo, omedetou.***

Virgin road kono saki ni tsudzuku michi nori wa****
Wedding march futari ayumu no sa.
Nakayoku kenka shite

"Doozo oshiawase ni"

...Uwaki shinai you ni (laugh)**

P.S. Itsuka umareru kimi no baby nimo yoroshiku ittoite okure.
Kuregure mo "Ojisan" to wa yobasenai yoo ni.

Happy Wedding*****

*"Bye bye" is not written, but is said.
**The laughs here aren't meant to be said, but indicate an "action" done by Miyavi. The kanji that was in place here means "laugh" but it's not so much a laugh sometimes as it's a smark or a light "huhun" kind of laugh. Regardless, don't actually say it, but if you like you can listen to Miyavi and try to follow what "noises" he makes in its place.
***Miyavi does not actually sing "iu yo" in this line, thus making the line actually "Mou ichido, omedetou"
****Miyavi goes straight into this line after "omedetou" like it's one line.
*****Not written in the lyrics, but Miyavi repeats "Happy Wedding" here at the end.