d'Verse - PoetsPub, Form For All highlighted Japanese poetry. Do go and read what Lady Nyo has to say on the subject, in particular this:-
"There are basically two forms of poetry in the Man’yoshu: choka (long poem, 5-7-5-7-5-7, etc. ending in 7-7) and tanka. (5-7-5-7-7)."
I have copied these characters which translate as 'Solitude', so here's my tanka inspired by that word..
to trace my lover's outline,
I am not alone
in forsaken arms of night
when my heart seeks his loving.