@@stnesbit2526 I'm glad you appreciate Sada Masashi. He is a really talented singer song writer and his songs are so beautiful, impressive, instructive, profound and full of Japanese sensibility.
In this song Sada Masashi sang his feelings for his mother, love and sympathy for his mother. So when this song was released and made a hit, he was called "a mother's boy," he himself talks self-abusively in his concert. (smile)
I'm glad this song touched you though you don't understand Japanese. In this song Sada Masashi sings his feeling for his mother. He thinks she has lived a modest life. He remembers her young days when she lived an honest life in spite of hardships and sadness. Some people say someone is lucky or unlucky, and he admits it is true. He might think his mother was not lucky, but he admires his mother's honest and modest life.