Love Lab

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Love Lab
The research scientists of
Love Lab intend to get to
the bottom of this whole
"love" thing. Just make sure
there aren't any accidents!
ConsoleDS Icon.png Rhythm Heaven
Love Lab
The research scientists of
Love Lab intend to get to
the bottom of this whole
"love" thing. Just make sure
there aren't any accidents!
ConsoleDS Icon.png Rhythm Paradise
Love Lab
ConsoleDS Icon.png
Prologue DS Love Lab.png
ConsoleDS Icon.png 19

Love Lab (恋の実験室?, Koi no Jikken-Shitsu) is the 4th Rhythm Game of the fourth stage (19th overall) in Rhythm Heaven.


Screenshot DS Love Lab.png

This game concerns the Research Scientists of Love Lab who are studying the science of love in the lab. The boy receives a flask from off-screen, which he grabs, causing a blue heart to appear. He then tosses it over to the girl (controlled by the player), who must grab the flask, causing a red heart to appear, and toss it over to the Mysterious Lab Tech in rhythm, who takes the flask away. If done correctly, the hearts connect into pink hearts, which are promptly collected in a bag. Sometimes, the boy shakes the flask, making more hearts appear, before throwing it. The player needs to shake in the same rhythm.


  • Tap (Hold): Catch
  • Tap (Release): Drop flask
  • Flick: Throw
  • Slide: Shake

Timing Display

  • Perfect!/Ace!: The flask is successfully caught, shaken and thrown. The girl quickly glances at the boy with a blush upon throwing. The hearts combine and fall into the white bag.
  • Early!/Late!: Grabbing the flask too early or too late results in a heart either not coming out or floating away. If throwing the flask too early or late, it causes the hearts to float away even if shaken correctly.[citation needed]
  • Miss...: The flask isn't grabbed or tossed, instead falling onto the table, shattering. Shaking off the beat does not make any hearts appear. If the player keeps holding the flask when they should throw it, any hearts that were emitted continue floating off-screen. Any unconnected hearts simply disappear in a skull-like vapor.


ConsoleDS Icon.png
Lab Notes(Flag of the United States.svg) Lab Notes(Flag of the United Kingdom (3-5).svg)
GradingNG DS.png
Were the flasks slippery?
You need to mix the flasks better.
You need to work on your toss timing.
Were the flasks slippery?
You need to mix the flasks better.
Your lobs were lacking in rhythm.
GradingOK DS.png
Good enough...
I don't know...
I guess that was all right.
Good enough...
I don't know...
I guess that was all right.
GradingHI DS.png
Nice job catching those flasks!
You shook the flasks like a pro!
You sure can fling a flask.
Nice job catching those flasks!
You shook the flasks like a pro!
You sure can fling a flask.


ConsoleDS Icon.png
GradingNG DS.png
GradingOK DS.png
GradingHI DS.png
Epilogue DS Love Lab NG.png Epilogue DS Love Lab OK.png Epilogue DS Love Lab HI.png
Are they talking about me!? See you tomorrow! Eureka! We've found love!




The following is commentary given on the STAFF'S VOICE section of the booklet included in Rhythm Tengoku Zen Kyoku-shu.

Japanese Translation
小黒 DS版のなかでは、僕のいちばんのお気に入りのゲームです。ゲームの本番が始まると、突然校舎が夕暮れになって、胸がキュンとするような感じが、もう何とも言えないですよね。 Oguro: Out of all the games in the DS version, this is my favorite. When the actual game begins, the school building suddenly turns to dusk, and I can't help but feel my heart pounding.

つんく♂ このゲームはホントにヤバイですねえ(笑)。フラスコを「シュコシュコ、フッ」って振っちゃうし。ここで使われているBGMは、実はモーニング娘。にいつか歌わせようと思って、ストックしていた曲なんです。作りかけの曲だったんですけどと、メロディがめちゃいいし、歌詞もつけるつもりだったんです。そこで、DS用にアレンジを頼んだら、アカペラが入った状態で戻ってきて、それを任天堂さんに渡したら、とても切ない感じのゲームになっで…。もつ、このままでええやんつて。最初は女の子に歌わせようと思っていたんですけど、この曲に歌詞をつけたらアカンと思ったんです。ところで、女の子が投げたフラスコを受け取ってるのは誰なんでしょうね? Tsunku♂: This game is really bad (laughs). I shake the flask saying "shukoshuko, hu" (laughs). The background music used in this game is actually Morning Musume. It's a song I kept in stock, thinking that I'd like them to sing it someday. It was a half-finished song, but the melody was really good, and I was going to add the lyrics. So, when I asked for an arrangement for the DS, it came back with an acappella in it, and when I gave it to Nintendo, it turned out to be a very heartbreaking game... I figured why not leave it like that. At first I was going to have the girl sing, but then I thought it would be a bad idea to put lyrics to this song. By the way, who is the one receiving the flask thrown by the girl?

米 フラスコを受け取ってるのは、リスのキャラクターなんです。エンディングで顔が見られるようになっているんですけど、僕もそれを見て初めて知りました(笑)。 Yone: The person receiving the flask is a squirrel character. You can see his face in the ending, but I didn't know until I saw that (laughs).


  • This game takes place in the daytime during the practice and Remix 10, and at sunset during the real game.
  • During Practice, the characters oddly do not move to the music.

Development History

Main article: Love Lab/Development

In Other Languages

Language Name Meaning
Flag of Japan.svg Japanese 恋の実験室 Love Laboratory
Flag of the United States.svg EnglishNOA Love Lab
Flag of the United Kingdom (3-5).svg EnglishNOE Love Lab
Flag of France (1794–1815, 1830–1974, 2020–present).svg French Labo de l'amour Love lab
Flag of Spain.svg Spanish La Química del Amor The Chemistry of Love
Flag of Germany.svg German Labor Amore Love Laboratory
Flag of Italy.svg Italian Scienziati pazzi Mad Scientists
Flag of South Korea.svg Korean 두근두근 실험실 Exciting Laboratory
Rhythm Tengoku (GBA/Arcade)
One Player
KaratekaRhythm DatsumoMarcherAir BatterPachi Pachi SanninshuRemix 1
Shiroi ObakeGame GBA 2-2.pngKossori RatBaikin HakaseGame GBA 2-5.pngRemix 2
Game GBA 3-1.pngGame GBA 3-2.pngUsagi TobiGame GBA 3-4.pngGame GBA 3-5.pngRemix 3
QuizGame GBA 4-2.pngRhythm o ShujiGame GBA 4-4.pngGame GBA 4-5.pngRemix 4
Hopping RoadNinjaGame GBA 5-3.pngGame GBA 5-4.pngTap DanceRemix 5
Bari Bari SanninshuGame GBA 6-2.pngCosmo DanceGame GBA 6-4.pngSuper TapRemix 6

Game GBA 7-1.pngGame GBA 7-2.pngGame GBA 7-3.pngGame GBA 7-4.pngGame GBA 7-5.pngRemix 7
Game GBA 8-1.pngGame GBA 8-2.pngGame GBA 8-3.pngGame GBA 8-4.pngGame GBA 8-5.pngRemix 8
Arcade Exclusive
Game GBA EX-1.pngGame GBA EX-2.pngGame GBA EX-3.pngGame GBA EX-4.pngGame GBA EX-5.pngGame GBA EX-6.png
Two Player
Game GBA 1-1.pngGame GBA 1-2.pngGame GBA 1-3.pngGame GBA 1-4.png
Game GBA 2-1.pngGame GBA 2-3.pngGame GBA 3-3.pngGame GBA 2-5.png
Game GBA 3-5.pngGame GBA 4-3.pngGame GBA 5-2.pngGame GBA 5-5.png
Game GBA 7-1.pngGame GBA 7-2.pngGame GBA 6-3.pngGame GBA 7-5.png
Game GBA 8-5.pngGame GBA 7-3.pngGame GBA 8-4.pngGame GBA 6-5.png
Game GBA EX-1.pngGame GBA EX-2.pngGame GBA EX-3.pngGame GBA EX-4.png
Rhythm Heaven
Built to ScaleGlee ClubFillbotsGame DS 1-4.pngRemix 1
Rhythm RallyShoot-'Em-UpGame DS 2-3.pngGame DS 2-4.pngRemix 2
Game DS 3-1.pngGame DS 3-2.pngGame DS 3-3.pngGame DS 3-4.pngRemix 3
Game DS 4-1.pngGame DS 4-2.pngGame DS 4-3.pngGame DS 4-4.pngRemix 4
Game DS 5-1.pngGame DS 5-2.pngGame DS 5-3.pngGame DS 5-4.pngRemix 5
Game DS 6-1.pngGame DS 6-2.pngGame DS 6-3.pngKarate ManRemix 6
Game DS B-Credit.png
Built to Scale 2Game DS 7-2.pngFrog Hop 2Game DS 7-4.pngRemix 7
Rhythm Rally 2Fillbots 2Game DS 8-3.pngGame DS 8-4.pngRemix 8
Game DS 9-1.pngKarate Man 2Glee Club 2Game DS 9-4.pngRemix 9
Shoot-'Em-Up 2Game DS 10-2.pngGame DS 10-3.pngGame DS 10-4.pngRemix 10
Rhythm Heaven Fever
One Player
Game Wii 1-1.pngGame Wii 1-2.pngGame Wii 1-3.pngGame Wii 1-4.pngRemix 1
Game Wii 2-1.pngGame Wii 2-2.pngGame Wii 2-3.pngGame Wii 2-4.pngRemix 2
Game Wii 3-1.pngBuilt to ScaleAir RallyFigure FighterRemix 3
Game Wii 4-1.pngGame Wii 4-2.pngMicro-RowSamurai SliceRemix 4
Game Wii 5-1.pngFlipper-FlopGame Wii 5-3.pngGame Wii 5-4.pngRemix 5
Game Wii 6-1.pngGame Wii 6-2.pngGame Wii 6-3.pngGame Wii 6-4.pngRemix 6
Game Wii 7-1.pngGame Wii 7-2.pngGame Wii 7-3.pngKarate ManRemix 7
Night Walk
Game Wii 8-1.pngGame Wii 8-2.pngBuilt to Scale 2Game Wii 8-4.pngRemix 8
Game Wii 9-1.pngGame Wii 9-2.pngGame Wii 9-3.pngGame Wii 9-4.pngRemix 9
Figure Fighter 2Micro-Row 2Game Wii 10-3.pngKarate Man 2Remix 10
Two Player
Fork LifterTambourineRingsideMicro-RowFlipper-FlopLaunch PartyTap TroupeKarate Man
Extra Games
The Clappy TrioSneaky SpiritsGame Wii EX-3.gifGame Wii EX-4.gif
Rhythm Heaven Megamix
Earth World
Honeybee Land
Karate ManGame 3DS ntrRobot S.pngGame 3DS rvlBadminton S.pngGame 3DS ctrStep S.png
Machine Land
Game 3DS agbHair S.pngGame 3DS ntrChorus S.pngGame 3DS rvlMuscle S.pngGame 3DS ctrFruitbasket S.png
The First Gate
Game 3DS ntrCoinToss L.png
Citrus Land
Game 3DS agbClap S.pngGame 3DS ntrShooting S.pngGame 3DS rvlFlea S.pngGame 3DS ctrInterprerter S.png
Donut Land
Game 3DS agbRabbit L.pngGame 3DS ntrAirboard L.pngGame 3DS rvlBatting L.pngGame 3DS ctrChameleon L.png
The Second Gate
Sick Beats
Barbershop Land

Game 3DS agbGhost S.pngGame 3DS ntrPingpong S.pngGame 3DS rvlGoma S.pngGame 3DS ctrWoodCat S.png
Songbird Land
Game 3DS agbShuji L.pngGame 3DS ntrBlueBirds L.pngGame 3DS rvlBird L.pngGame 3DS ctrDotsamurai L.png
The Third Gate
Game 3DS ctrChicken L.png

Lush Woods
Lush Tower
Game 3DS agbBatter L.pngGame 3DS ntrNinja L.pngGame 3DS rvlGolf L.pngGame 3DS ctrSumou L.pngGame 3DS remix LED.png
Honeybee Tower
Game 3DS rvlKarate 1.pngGame 3DS ntrRobot L.pngGame 3DS rvlBadminton L.pngGame 3DS ctrStep L.pngGame 3DS remix 00.png
Machine Tower
Game 3DS agbHair L.pngGame 3DS ntrChorus L.pngGame 3DS rvlMuscle L.pngGame 3DS ctrFruitbasket L.pngGame 3DS remix 01.png
Citrus Tower
Game 3DS agbClap L.pngGame 3DS ntrShooting L.pngGame 3DS rvlFlea L.pngGame 3DS ctrInterprerter L.pngGame 3DS remix 02.png
Donut Tower
Game 3DS agbRat L.pngGame 3DS ntrIdol L.pngGame 3DS rvlManju L.pngGame 3DS ctrBlanco L.pngGame 3DS remix 03.png
Barbershop Tower
Game 3DS agbGhost L.pngGame 3DS ntrPingpong L.pngGame 3DS rvlGoma L.pngGame 3DS ctrWoodCat L.pngGame 3DS remix 04.png
Songbird Tower
Game 3DS agbTap L.pngGame 3DS ntrFrog L.pngGame 3DS rvlInterview L.pngGame 3DS ctrTango L.pngGame 3DS remix 05.png
Heaven World
Star Land
Game 3DS agbTono L.pngGame 3DS ntrCameraMan L.pngGame 3DS rvlRocket L.pngGame 3DS ctrPillow L.png
Comet Land
Game 3DS agbMarcher L.pngGame 3DS ntrShugyo L.pngGame 3DS rvlSeesaw L.pngGame 3DS ctrBear L.png
Planet Land
Game 3DS agbSpaceDance L.pngGame 3DS ntrBackbeat L.pngGame 3DS rvlBook L.pngGame 3DS ctrTeppan L.png
The Fourth Gate
Game 3DS rvlSword L.png
Mamarin Palace
Left-Hand Tower
Game 3DS agbClap A.pngGame 3DS ntrIdol A.pngGame 3DS rvlMuscle A.pngGame 3DS ctrBlanco A.pngGame 3DS remix 06 2.png
Right-Hand Tower
Game 3DS agbTap A.pngGame 3DS ntrFrog A.pngGame 3DS rvlGolf A.pngGame 3DS ctrDotsamurai A.pngGame 3DS remix 07 2.png
Tibby's Mom

Game 3DS agbSpaceDance A.pngGame 3DS ntrPingpong A.pngGame 3DS rvlManju A.pngGame 3DS rvlKarate 4.pngGame 3DS remix TED 2.png

Shop No. 1
Game 3DS agbHopping L.pngGame 3DS agbNightWalk L.pngGame 3DS agbQuiz L.png
Shop No. 2
Game 3DS ntrBoxShow L.pngGame 3DS ntrShortLive L.pngGame 3DS rvlKarate 2.png
Shop No. 3
Built to ScaleGame 3DS rvlDate L.pngGame 3DS rvlFishing L.png
Shop No. 4
Game 3DS rvlFork L.pngGame 3DS rvlRap L.pngGame 3DS rvlReceive L.png
Shop No. 5
Game 3DS rvlRobot L.pngGame 3DS rvlRotation L.pngSamurai Slice
Shop No. 6
Game 3DS rvlSort L.pngGame 3DS rvlWatch L.pngGame 3DS rvlKarate 3.png