If you are a seafood and fish lover, then you definitely have to visit this market. Best time to visit is after 4 am when tuna auctions start. Though you have to wake up early, it is totally worth it. You can have a meal in the famous restaurant Enodo Sushi afterwards.
Mon - Sat: 4 am - noon
Sun, holidays: closed
Wikipedia https://ja.wikipedia.org/wiki/大阪市中央卸売市場本場
More information http://www.osaka-info.jp/en/model_courses/sightseeing_for_early_birds/a_tasty_morn_at_central_wholesale_mart.html
Email info@endo-sushi.com
Phone +81 6 6469 7108
Address 1 Chome-1-86 Noda, Fukushima-ku, Ōsaka-shi, Ōsaka-fu 553-0005, Japan
Coordinates 34°41'2.885" N 135°28'39.616" E