Intro:

[Note: The A7sus4 should be played as an A7 without third, g - a - e, but can also 
be played as the full A7sus4, g - a - d - e]

A7sus4         Dsus4
I believe your promise
Em
It's too hard to give me courage
A7sus4   Dsus4       Em
Always I feel it the precious time seeing you

Verse:

[Note: A7sus4 as above, Ebdim is g flat - a - e flat]
[Note: Chords in brackets are not essential but sound nice to move along with the bass]

A7sus4  Dsus4 Em
Tachidomatta kata ni
A7sus4  Dsus4    Em
Asu e mukau kaze wo kanjiteta
A7sus4   Dsus4 Ebdim     Em     A7sus4 
Machi no akari hoshikuzu mitai ni
Dsus4     Em    (Dsus4) (Dsus4/G)     Cadd9(-> to bridge)
   Futari tsutsumu--    ke--    do--

Bridge:

[Note: Bbmaj7 is B flat - d - f - a]

Cadd9  Hm7       Eb       Em7       Cadd9
Sorezore ni chigau kagayaki ga aru to
      Hm7     Bbmaj7   Am7      Dsus4   G(-> to chorus)
Warau kimi ga ichiban mabushiku mieru yo--

Chorus:

[Note: F6 is f - a - c - d, it can be seen as Dm7/F but the F in the bass is important]

G       F#m7      H     Em         Em/D               Cadd9
Kimi wa ryuusei no you ni kodoku na tsubame no you ni
G/H             Am7      D
Yoru no yami wo kirisaki yukeru hazu
G       F#m7   H       Em       Em/D           Cadd9
  Tokei jikake no hibi ni nagasaresou na toki wa
G/D        Eb      F6
Wasurenaide hitori ja nai koto

Intro/Verse (same chords as above in the intro/verse):

I believe your promise
It's too hard to give me courage
Always I feel it the precious time seeing you

Jibun rashisa nante
Kangaetemo imi nante nai ne
Donna toki mo kimi wa kimi dakara
Arinomama de ite