I mentioned earlier about Kuromon Market ... Here is more about it.
Kuromon Market is the most active and busiest food market in Osaka. On both sides of the networks of narrow streets, approximately 150 food shops sell a variety of the freshest food, such as fish, meat, vegetables, fruits, dried seaweed.
They said "Kuromon is the kitchen of Osaka". This is because customers from the entire Osaka City, including not only house wives but cooks of high-class restaurants, look for the best ingredients for their Japanese cooking -- sushi-grade fish, best quality meat, fresh vegetables and fruit, pickled seaweeds and vegetables, including fresh sushi lunch & other small restaurant at bargain prices.