I love this song.
..and yes. It's in Japanese.

EXEC_PHANTASMAGORIA/.
Vocals: Mitose Noriko, Shikata Akiko, Shimotsuki Haruka
Lyrics: Kudo Junko
Composition: Tsuchiya Akira
Arrangement: Tsuchiya Akira

***(A) Mitose Noriko, (B) Shikata Akiko, (C) Shimotsuki Haruka***

(A) Kusa wa (B) hikari (C) mizu wa (A) haneru
(A) Mushi wa (B) utai (C) kigi wa (A) odoru

Wee yea ra enne ar sar Wee yea ra enne ar dor
Wee yea ra enne ar ciel Rrha yea ra ieeya en near

(A) Asa wa subete no ue ni otozure kinou no namida sora e kaeru

(A) Ah kizuato nokoru daichi de mada nemuru me o yuriokosu megumi no ame ni nare
(B) Itsukushimi no ame ni nare
(C) Itsuka owaranu yume ni tozasareta mama nemuru me o yuriokosu megumi no ame ni nare

Fou yea ra waath ar ciel, en hymme mea, weel nepo en keen ar sar

(A) Kasanaru hadou
(B) Ikutsu mo no chigau merodi sorezore no kotoba
(C) Sukoshi-zutsu ippo-zutsu chikazukiaeru

(A) Ikutsu mo no chigau omoi de ikutsu mo no koe de
(B) Tsunagiai te to te no naka hitotsu no onaji sono negai
(C) Tsunagiai te to te no naka hitotsu no onaji sono negai

(A) Ah nagaku kataku na rekishi no ue ai no mizu ga oriru kagirinai mirai o takushite
(B) Kawaita toshitsuki ni mizu wa nijimite yuku
(C) Kawaita toshitsuki ni mizu wa nijimite yuku

(A) Nikushimi wa ichimen ni karehate ima yurushi no hana ga saku iki to shi ikeru mono subete no mune ni
(B) Hana wa ikiru mono no subete no mune ni
(C) Hana wa ikiru mono no subete no mune ni

(A) Ano hi yasashii uta o wasurete hane o tatanda kotori-tachi yo
(B) Tooi haruka na kaze o machinagara hane o tatanda kotori-tachi yo
(C) Ano hi yasashii uta o wasurete hane o tatanda Ah kotori-tachi yo

(A) Ah kake yuku kaze ni dakarete mata maiagare takai sora e
(B) Ai no yorokobi utai doko made mo todokete okure takai sora e
(C) Ah kake yuku kono kaze ni dakare mata maiagare~ takai sora e

(A) Umareta inochi
(B) Ikutsu mo no chigau katachi de mazaranai iro de
(C) Hitori-zutsu hiotsu-zutsu kakegae no nai

(A) Ikutsu mo no chigau shokutaku ikutsu mo no madobe
(B) Tsutaeai kokoro no naka hitotsu no onaji kono negai
(C) Tsutaeai kokoro no naka hitotsu no onaji kono negai

(A) Ah yagate sabita tsurugi o kakonde midori no tsuru ga hau kanashimi no kioku o tsutsunde
(B) Shizuka ni midori nasu hizashi furisosogu
(C) Shizuka ni midori nasu hizashi furisosogu

(A) Kagayaki wa na mo shiranu dareka no ue aisuru hito no ue iki to shi ikeru mono subete no ue ni
(B) Ai wa ikiru mono no subete no ue ni
(C) Ai wa ikiru mono no subete no ue ni

(A) Itsumo ai o yasashii kono hibi o kono uta o kagayaku ashita e
(B) Itsumo kono hana o zutto kono hibi o kitto yakusoku o kagayaku ashita e
(C) Itsumo kono hana o zutto kono hibi o kitto yakusoku o kagayaku ashita e

(A) La La La La La La…
(B) La La La La La La La La…
(C) La La La La La La La La…

Translations:
(A) Grass (B) shines; (C) water (A) jumps
(A) Insects (B) sing; (C) trees (A) dance

A wish to the sky, a wish to the earth
A wish to the world, hope for life

(A) The morning visits above everything and yesterday’s tears return to the sky

(A) Ah, become the rain of blessings that shakes awake the still sleeping sprouts on the earth where scars remain
(B) Become the rain of mercy
(C) Become the rain of blessings that shakes awake the sleeping sprouts still shut in endless dreams someday

Put your thoughts into it, indeed now is the time of this world’s rebirth. Oh earth, moisten… Oh sky, sparkle…

(A) Overlapping surges
(B) Many different melodies; respective words
(C) Little by little, step by step, we can draw closer to each other

(A) With many different thoughts, with many voices
(B) Within our joined hands, there exists that one and the same wish
(C) Within our joined hands, there exists that one and the same wish

(A) Ah, on the lengthy and obstinate history, the water of love falls, entrusting the limitless future
(B) Water is staining the parched ages
(C) Water is staining the parched ages

(A) Hatred withers on the whole side, and now the flowers of forgiveness bloom; all living creatures are in my chest
(B) Flowers are in the chests of all creatures
(C) Flowers are in the chests of all creatures

(A) Oh the little birds, who forgot about the tender song on that day and folded their wings
(B) Oh the little birds, who folded their wings while waiting for the distant, faraway wind
(C) Ah, the little birds, who forgot about the tender song on that day and folded their wings

(A) Ah, you will soar; embraced by the wind, fly high again to the lofty sky
(B) Sing about the joys of love and send them to everywhere, to the lofty sky
(C) (A) Ah, you will soar; embraced by this wind and fly high again~ To the lofty sky

(A) The newborn life
(B) With many different shapes, with unmixed colors
(C) Person by person, one by one, irreplaceable

(A) Many different dining tables, many window sides
(B) Within hearts that converse with each other, there exists this one and the same wish
(C) Within hearts that converse with each other, there exists this one and the same wish

(A) Ah, before long, the vines of the greenery will creep and enclose the rusted swords, wrapping the memories of sadness
(B) Greenery quietly overgrows; sunlight pours
(C) Greenery quietly overgrows; sunlight pours

(A) Brilliance is above someone whose name is unknown, above beloved people, all living creatures, above everything
(B) Love is above all creatures
(C) Love is above all creatures

(A) Love, these tender days, this song always go to the sparkling tomorrow
(B) These flowers always, these days forever, the promise certainly go to the sparkling tomorrow
(C) These flowers always, these days forever, the promise certainly go to the sparkling tomorrow

(A) La La La La La La…
(B) La La La La La La La La…
(C) La La La La La La La La…

Source: http://atashi.wordpress.com/2008/01/04/ar-tonelico-good-end-hymn-exec_phantasmagoria/