This japanese song is taken from 1 litre of tears. It's the love theme for the show... I love it.

Remioromen - Kona yuki
Kona yuki mau kisetsu wa
itsu mo sure chigai
hitogomi ni magirete mo
onaji sora miteru no ni
kaze ni fukarete
nita you ni kogoeru no ni

boku wa kimi no subete nado
shitte wa inai darou
sore demo ichiokunin kara
kimi wo mitsuketa yo
konkyo wa naikedo
honki de omotteru n da

sasai na ii ai mo nakute
onaji jikan wo
ikite nado ikenai
sunao ni narenai nara
yorokobi mo kanashimi mo
munashii dake

kona yuki nee kokoro made
shiroku somerareta nara
futari no kodoku wo
wake au koto ga dekita no kai

boku wa kimi no kokoro ni
mimi wo oshiatete
sono koe no suru hou e
sutto fukaku made
orite yukitai
soko de mou ichido aou

wakari aitai nante
uwabe wo nadete
ita no wa boku no hou
kimi no kajikanda te mo
nigirishimeru
koto dake de
tsunagatteta no ni

kona yuki nee
eien wo mae ni amari ni moroku
zara tsuku
asufaruto no ue shimi ni natte yuku yo

kona yuki nee
toki ni tayori naku kokoro wa yureru
sore demo boku wa kimi
no koto mamori tsuzuketai

kona yuki nee kokoro made
shiroku somerareta nara
futari no kodoku wo tsutsunde
sora ni kaesu kara

Remioromen - Powdered Snow (English translation)
We always pass by one another in the season
where the powdered snow flutters
Even though I slip away into the crowd,
we're looking up at the same sky
We're freezing,
as though we were blown by the same wind

I probably don't know
everything about you
Yet out of one hundred million people,
I found you
I have no basis for this,
but it really is what I think

There are no fights that are trivial
We can't live together
at the same time
If we can't be ourselves
Then happiness and sadness are both
just lies

Powdered snow, hey, when you coloured us white,
all the way to my heart
Could we then
understand our loneliness?

Pressing my ear
against your heart
I want to go down toward
the sound of your voice
Until I get down that deep,
let's meet up there again

I want us to understand
I was the one
who stroked the surface
Even though we were
connected by
Me holding your hand
that was numb with the cold

Powdered snow, hey,
you, in a way that is too fragile
Turn eternity
into a stain on the rough asphalt up ahead

Powdered snow, hey,
my unreliable heart wavers
And yet, I want
to keep protecting you

Powdered snow, hey, when you coloured us white,
all the way to my heart
You envelop our loneliness,
and return it back to the sky