OK.
The composer of that music is Mr. Hiroshi Miyagawa.
He has died at the age of 75 in 2006.
The title of that music is "Ooinaru ai" (Japanese).
I do not know that title in English.
The meaning of "Ooinaru ai" is "great love."
This music is not sold in Japan now.
Hi, SacrificialLoon.
In a English version, I did not know that it was a name of "Starblazers" until now.
But I feel that that title makes that movie spoilt.
Because "Yamato" is the name of the battleship which fought with the United States at the time of World War II.

And Japanese spirit (soul) is expressed as "Yamato."
Therefore, "Yamato" is the Japanese itself (themselves).
At YouTube, it is introduced in the title "Farewell to Space Battleship Yamato."