Here we are, picking the first fern-shoots
And saying: When shall we get back to our country?
Here we are because we have the Ken-nin for our foemen,
We have no comfort because of these Mongols.
We grub the soft fern-shoots,
When anyone says “Return,” the others are full of sorrow.
‘Ken-nin’ is a version of the Japanese ‘Ken-in’, from the Chinese ‘Hsien-Yün’, which means something like ‘wild tribes’. 
 
 ‘Foemen’ is an uncommon word, but it condenses the phonems in the preceding ‘for our’ beautifully, sharpening the end of the line.