The Tops - It Rains for Three Days (The Hakkenden)

From the closing of The Hakkenden.

Another version, taken directly from the anime:

The Tops - 雨が三日続くと

記憶はいつか消えてゆくよ
何回もあやまち繰り返し
せめて夕焼け雲の彼方
せつなくて震える心があれば

雨が三日続くと森は金色に輝く
当たり前だけど感じる人はない

争いは永遠に続く
何億の魂願っても
せめて湿った風の中で
過ぎてゆく季節を愛していたい

雨が三日続くと鳥は南へ向かう
当たり前だけど感じる時代はない

雨が三日続くと大きな川が流れる
当たり前だけどわかっていてほしい

雨が三日続くと夜は藍色に輝く
当たり前だけど感じていてほしい

The Tops - It Rains for Three Days

Memories will someday disappear
Repeating mistakes again and again
At least if in the distance of the clouds at sunset
There are hearts that tremble in pain

When the rain continues for three days, the forest shines golden
It’s obvious, but there’s no one who notices it

Strife continues eternally
However many thousands of souls pray
At least in the moist wind
Through the passing seasons, wanting to love

When the rain continues for three days, the birds head south
It’s obvious, but there’s no generation that notices it

When the rain continues for three days, the big rivers flow
It’s obvious, but it wants to be known

When the rain continues for three days, the night shines in indigo
It’s obvious, but it wants to be noticed

Lyrics from AnimeLyrics.com