Midon the fisherman is wounded and can't go fishing.  He borrows money from a samurai, but can't pay it back. A wife gets mad at her drunkard husband and returns to her parents.  But she misses her husband now that she's left him. A young servant named Sutekichi loves katanas.  He wants his own, so he pays a blacksmith with a thousand logs to make one for him.
It would be worth it to do him a favor.
Le haré el favor para luego cobrárselo.
Le haré el favor, pero 
luego me lo devolverá.
Vai ser proveitoso que ele
 me deva um favor.