ココロ (Kokoro)

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Background[]

"Kokoro" is a song featuring Kagamine Rin by Toraboruta-P.

The song tells a story about a robot (Rin) made by a lonely scientist, but is missing a program unable to be made: a heart. Some time after her creation, her scientist passes away, leaving her alone for several hundred years. She begins to wonder about her creation and makes a wish. She accesses the files that her creator had left and finally gains a heart. In the process, she discovers what it's like to be happy and sad. With her new feelings, she gratefully dedicates all of the songs that she sings to her creator. In the end, the miracle robot had a short in her system and could no longer sing. However, she had a smile on her face in her last moments, resembling an angel.

A prequel named Goodbye, Thank You was made for the album of the same name. It tells the story of the robot's creation and the making of the heart told from the scientist's (Gackpo) point of view.

This song has entered the Hall of Legend.

Succeeding versions[]

Asami Shimoda's Cover

Featuring	Asami Shimoda
Producers	Toraboruta-P
Categories	Human cover
Description	A cover of the song by Asami Shimoda, featured in Prism.

The VOCALOID ver

Featuring	Kagamine Rin
Producers	Toraboruta-P
Categories	Self Cover; VOCALOID cover
Description	A cover of the song made with VocaListener featured in The VOCALOID.

Kokoro - Piano ver.

Producers	Toraboruta-P
Categories	Self Remix, Arrangement
Description	A piano arrangement featured in Goodbye, Thank You.

Lyrics[]

Japanese (日本語歌詞)	Romaji (ローマ字)
孤独な科学者に作られたロボット	kodoku na kagakusha ni tsukurareta robotto
出来栄えを言うなら”奇跡”	dekibae o iu nara "kiseki"
だけどまだ足りない　一つだけ出来ない	dakedo mada tarinai　hitotsu dake dekinai
それは「心」と言うプログラム	sore wa "kokoro" to iu, puroguramu

幾百年が過ぎ	ikuhyaku toshi ga sugi
独りで残された	hitori de nokosareta
奇跡のロボットは願う	kiseki no robotto wa negau
知リタイ　アノ人ガ	shiritai　ano hito ga
命ノ　終リマデ	inochi no　owari made
私ニ　作ッテタ「ココロ」	watashi ni　tsukutteta　"kokoro"

今　動き始めた　加速する奇跡	ima　ugoki hajimeta　kasoku suru kiseki
ナゼか　ナミダが　止まらナい・・・	nazeka　namida ga　tomaranai…
ナぜ　私　震える？　加速する鼓動	naze　watashi　furueru?　kasoku suru kodou
こレが私の望んだ「ココロ」？	kore ga watashi no nozonda "kokoro"?

フシギ　ココロ　ココロ　フシギ	fushigi　kokoro　kokoro　fushigi
私は知った　喜ぶ事を	watashi wa shitta　yorokobu koto o
フシギ　ココロ　ココロ　フシギ	fushigi　kokoro　kokoro　fushigi
私は知った　悲しむ事を	watashi wa shitta　kanashimu koto o
フシギ　ココロ　ココロ　ムゲン	fushigi　kokoro　kokoro　mugen
なんて深く切ない・・・ああああ～～	nande fukaku setsunai… aaaa~~

今　気付き始めた　生まれた理由を	ima　kizuki hajimeta　umareta riyuu o
きっと独りは寂しい	kitto hitori wa sabishii
そう、あの日、あの時	sou, ano hi, ano toki
全ての記憶に宿る「ココロ」が溢れ出す	subete no kioku ni yadoru “kokoro” ga afuredasu
今　言える　本当の言葉	ima　ieru　hontou no kotoba
捧げるあなたに	sasageru　anata ni

アリガトウ・・・　この世に私を生んでくれて	arigatou…　kono yo ni watashi o unde kurete
アリガトウ・・・　一緒に過ごせた日々を	arigatou…　isshoni sugoseta hibi o
アリガトウ・・・　あなたが私にくれた全て	arigatou…　anata ga watashi ni kureta subete
アリガトウ・・・　永遠に歌う	arigatou…　eien ni utau

Below is an unofficial English translation: via Project DIVA. Amendments may have been made to the original translation. —Featured in Hatsune Miku -Project DIVA- F 2nd, the writer is uncredited.

A robot made by a lonely scientist
In almost every way a "miracle"
But this miracle wasn't enough
There was one thing it couldn't run:
A program called "Kokoro"

Centuries pass
Left all alone
The miracle robot pleads
I want to know how he felt
Working till his dying day
Making it for me
My "Kokoro"

Just now it started, a quickening miracle
For some strange reason the tears won't stop
Why am I shaking? The accelerating beat
Is this the "Kokoro" I wanted?

Now I can say these words of truth
And offer them to you

Thank you…
For bringing me into this world
Thank you…
For the days spent together
Thank you…
For all you've given me
Thank you…
Forever I'll sing

Derivatives[]

Ree-chan's Cover ft. GUMI [VOCALOUD Mix]

Featuring	GUMI Native
Producers	Ree-chan (cover, VSQx), meola (illust)
Categories	VOCALOID Cover

Jasputing's Cover ft. flower [VOCALOUD Mix]

Featuring	flower
Producers	Jasputing (cover), Area (illust), Ree-chan (VSQx)
Categories	VOCALOID Cover

Lucifer's Cover ft. Kagamine Rin V4X

Featuring	Kagamine Rin V4X
Producers	Lucifer (cover, VSQx)
Categories	VOCALOID Cover

Irora's Cover ft. Kagamine Rin and Len V4X

Featuring	Kagamine Rin & Len V4X
Producers	Irora (cover), Glider (video), NeeMiSo (UST)
Categories	VOCALOID Cover
Description	A mash-up with Kokoro・Kiseki.

ryusouta's Cover ft. Kagamine Rin V4X

Featuring	Kagamine Rin V4X
Producers	ryusouta (cover, video, VSQx)
Categories	VOCALOID Cover

Ariotsu's Cover ft. Kagamine Rin Append

Featuring	Kagamine Rin Append
Producers	Ariotsu (cover, video, VSQx)
Categories	VOCALOID Cover

NeeMiSo's Cover ft. Natsu Tama and Harune Shirori

Featuring	Natsu Tama and Harune Shirori
Producers	NeeMiSo (cover, UST)
Categories	UTAU Cover
Description	A mash-up with Kokoro・Kiseki.

ryusouta's Cover ft. Hatsune Miku NTβ

Featuring	Hatsune Miku NTβ
Producers	ryusouta (cover), iXima (illust)
Categories	Piapro Studio Cover

Shiroko Diamond Sparkle's English Cover

Featuring	Shiroko Diamond Sparkle
Producers	*Razzy (lyrics), Yoru (subtitles)
Categories	Human Cover; Alternative Language

English Chorus of 12

Featuring	cir, LucyHasYou, Queen KoKo, saint, KT, xildy, Shiroko Diamond Sparkle, k*chan, joakkar, zoozbuh, Caspy, KEH
Producers	*Razzy (lyrics), saint (illust, video)
Categories	Human Cover; Alternative Language

FaeriMagic's English Cover

Featuring	FaeriMagic
Producers	FaeriMagic (cover, lyrics)
Categories	Human Cover; Alternative Language

SupaMame's Live Action MV

Featuring	Yamai and Usa
Producers	Akia (Rin), Syao (Len)
Categories	Live Action MV

Piano Arrangement

Producers	sora (cover, video)
Categories	Arrangement

Piano Arrangement

Featuring	The Perfect PROGRAM
Producers	Masaki (arrange), Hekicha (illust, video)
Categories	Arrangement; Fanmade PV
Description	A remix featured in the album Melody∞Cycle.

Violin Piano Duet

Producers	Umidori san (violin), sora (piano), sishenfan (illust)
Categories	Arrangement

Rock Version

Featuring	Kagamine Rin Append
Producers	999777FRA, uzP (arrange), SakuneUtau04 (VSQx)
Categories	Arrangement

Brother-P's 3DPV

Featuring	Kagamine Rin
Producers	Brother-P (fanmade PV)
Categories	3DPV

Glider's PV

Featuring	Kagamine Rin
Producers	Glider
Categories	Fanmade PV

Fukusanbutsu-P's PV

Featuring	Kagamine Rin
Producers	Fukusanbutsu-P
Categories	Fanmade PV
Description	It was this PV which popularized the dialogue at the ending of the song.

Hinata's PV

Featuring	Kagamine Rin
Producers	Hinata
Categories	Fanmade PV
Description	A popular PV which has reached 10,000+ views on NND.

Iri's Manga PV

Producers	Iri
Categories	Adaptive Manga
Description	A touching take on the ココロ story by Ema Arihara, showing the true intimacies the robot and scientist experience. A mix of the original song, piano arrangement and orchestral arrangement are played throughout the slideshow. It is considered the epitome of the "Kokoro" saga and the emotions it invokes. The doujinshi is available to read in pixiv.

ClearTranquil's Live Action PV

Featuring	Namakonyuroko
Producers	ClearTranquil
Categories	PV, Human cover

Kokoro・Kiseki

Featuring	Kagamine Len
Producers	Jun-P
Categories	Spin-off, cover

Kokoro・Another

Translation	Kokoro・Another (Heart・Another)
Categories	Spin-off
Description	The songs of the series are arrangements of "Kokoro" and "Kokoro・Kiseki". Suginohito and his group, who produced the series, changed the original lyrics and they are based on a fanfic written by Oshimaino-P. They announced the episodes of the series has nothing to do with the originals.^[1]

Kokoro x Double Lariat x ACUTE

Featuring	Megurine Luka, KAITO, Hatsune Miku, Kagamine Rin
Categories	Mashup
Description	a mashup of blending in three popular vocaloid songs. Kokoro, Double Lariat and ACUTE

Pokkari's Music Box Arrange (Kokoro x Koroko・Kiseki)

Producers	Pokkari
Categories	Arrangement; Mashup

Other media appearances[]

Literatures[]

This song was featured in the following literatures:

Piano Solo Yasashiku Hikeru collection. (piano sheet music)
VOCALOID Best Selection series. (sheet music)

Novel adaptation[]

Official Website

Toraboruta-P announced that on April 27, 2012; (previously it's stated to be April 17, but it was delayed) he will release his novel entitled "Kokoro", a novel based on the song.

The novel is written by Katsuyoshi Ishizawa and illustrated by Nagimiso.SYS, an illustrator most notable for his PV of "Roshin Yuukai" also a card illustration by redjuice. The price is 1,200 yen and was available for purchase in Amazon on April 27.

A crossfade of the novel ("Kokoro" arrangement by Toraboruta-P and video by Nagimiso.SYS) can be seen on niconico and YouTube. A month after the novel was put on sale on Amazon, it was announced that the "Kokoro" novel had sold out and could no longer be purchased from Amazon. There is currently no news of a second wave of printing; it has sold faster than expected.^[2]

The novel tells the story of a group of scientists who worked on realistic-looking robots. Their works included 'Number 02' (Kagamine Rin) and 'Mirai' (Hatsune Miku). One of the scientists wished to install the Heart, a program that allowed the robots to have feelings, into Number 02. However, the others refused, due to the fact that a few years back, when they installed the program into 'Number 01 Rin', the robot went insane and killed a scientist named Kagamine Rin. The robot has since been modified into 'Number 02'. The Heart, which still contained memories of Rin, was secretly installed into Number 02. Many centuries later, Number 02 woke up and found out that she was surrounded by a search party. There she meets 'B' (Kagamine Len), who explains to her that they were looking for the Heart. Number 02 then explains the origins of the Heart…

Discography[]

This song was featured in the following albums:

Torabotic World
Goodbye, Thank You
Torabotic Symphony
Vocalostar
Hatsune Miku ‐Project DIVA‐ 2nd NONSTOP MIX COLLECTION
Nico Nico East Storybook Original Song Collection
VOCALO★POPS BEST
VOCALOID BEST from Nico Nico Video (Red)
The VOCALOID
Vocalogemini
Vocalo Supermix
TIME TO SAY HELLO!
Project mirai COMPLETE
LODESTAR

Concerts[]

This song was featured in the following concerts:

MikuExpo Live in LA and NY 2014
SNOW MIKU LIVE!
Magical Mirai 2017 (Day 2)
MikuExpo Live in Europe 2020 (Paris and Amsterdam only)
Kagamine Rin & Len Happy 14th Birthday Party 「Two You☆★」
MikuExpo New Zealand & Australia 2024

Animelo Summer Live 2009[]

Animelo is an Anime-Central concert where songs from various anime are performed in a concert-like fashion. It was here that Miku appeared as a surprise in 2009. Not only Miku came, but Rin and Len's voice provider, Asami Shimoda, sang "Kokoro" as a teaser for introducing Miku, who sang みくみくにしてあげる♪ (Miku Miku ni Shite Ageru♪). The song Black★Rock Shooter followed Miku's appearance, along with its anime's trailer.