NOTE: I found this English translation online - I don't speak Japanese and I can't guarantee they're accurate, but it looks like they fit the choreography - am thinking they're close to the meaning of the original Japanese.
FLASH/ by Perfume
[Verse 1]
Hana no iro ga kawareru hodo no
Nagai toki no mitsudo ni chikakute
FURE-MU wa isshun SURO- MO-SHON de
Iccho kusen hikari saku youni
Kuuki wo yurase kodou wo narase
Shizuka na yoru ni ima hi wo tsukeru no
Koi tomo zen zen chigau EMO-SHON
HONTO ni sore dake nano (sore dake nano)
[Chorus]
Hibana no youni FLASH hikaru
Saikou no Lightning game
Narashita oto mo okizari ni shite
FLASH koeru
Saikou no Lightning speed
Hayai toki no naka de chi haya furu
FLASH hikaru
Saikou no Lightning game
Kazashita te wo yumiya ni kaete
FLASH koeru
Saikou no Lightning speed
Negau shinkuu no ma de todoki sou da FLASH
[Verse 2]
Mau ochiba ga chi ni tsuku made no
Setsunateki na sokudo ni chikakute
FURE-MU wa isshun HAI SUPI-DO de
Iccho kusen hikari saku youni
Kuuki wo yurase kodou wo narase
Shizuka na yoru ni ima hi wo tsukeru no
Koi tomo zen zen chigau EMO-SHON
Konya wa kore kara nano
[Chorus]
Hibana no youni FLASH hikaru
Saikou no Lightning game
Narashita oto mo okizari ni shite
FLASH koeru
Saikou no Lightning speed
Hayai toki no naka de chi haya furu
FLASH hikaru
Saikou no Lightning game
Kazashita te wo yumiya ni kaete
FLASH koeru
Saikou no Lightning speed
Negau shinkuu no ma de todoki sou da FLASH
(chi haya furu x4)
[Verse 1]
Coming close to the density of the length of time
It takes for the color of a flower to change
The form lasts a moment, in slow motion
A straight line, like the splitting of light
The air trembles with the sound of the beat.
A totally different emotion from love
That’s now set on fire in a silent night
Is that really all?
[Chorus]
Just like a spark of Flash, shining
The greatest Lightning Game
Even if the emitted sound has been left behind
Flash, it exceeds more
The greatest Lightning Speed
In a short time, with enormous momentum
Flash, shining
The greatest Lightning Game
Turn your raised hands into a bow and arrow
Flash, it exceeds more than
The greatest Lightning Speed
Your wish is about to be received through the vacuum, Flash
[Verse 2]
Coming close to the momentary speed
Of the falling leaves as they flutter to the ground
The form lasts a moment, in high speed
A straight line, like the splitting of light
The air trembles with the sound of the beat.
A totally different emotion from love
That’s now set on fire in a silent night
Is tonight a new beginning?
[Chorus]
Just like a spark of Flash, shining
The greatest Lightning Game
Even if the emitted sound has been left behind
Flash, it exceeds more
The greatest Lightning Speed
In a short time, with enormous momentum
Flash, shining
The greatest Lightning Game
Turn your raised hands into a bow and arrow
Flash, it exceeds more
The greatest Lightning Speed
Your wish is about to be received through the vacuum, Flash
(With enormous momentum x 4)