"Gumi" is THIS PLANT, bearing little red fruit in the autumn. The Japanese for "rowan-tree" is "nanakamado", which may be a prosaic-sounding word for a song, unlike poetical and nostalgic "gumi".

WASURENAGUSA O ANATA NI ("Forget-me-not For You")

Wakaretemo wakaretemo kokoro no oku ni
Itsumademo itsumademo
Oboeteoite hoshiikara
Shiawase inoru kotoba ni soete
Wasurenagusa o anata ni anata ni

Itsuno yo mo ituno yo mo wakareru hito to
Au hito no au hito no
Sadame wa tsune ni arumono o
Tada nakinurete hamabe ni tunda
Wasurenagusa o anata ni anata ni

Yorukobi no yorokobi no
Namida ni kurete
Idakiau idakiau
Sono hi ga itsuka kuruyo(o)ni
Futari no ai no omoide soete
Wasurenagusa o anata ni anata ni

~Masato