I staying Daikoku Hostel in Osaka for 5 days to give me time to prepare for my friend visiting.
This hostel was really nice and I would highly recommend it because it was so clean, the owner was so helpful and the bed were comfortable.
Its location to the main site in Osaka is great too, what is even better is that the apartment I have rented for my friend and I is less than 10 minute walk away.