Very easy to use underground trains , we visited the Mint museum , out of station cross river then walk beside the river you then arrive at the mint we just missed the cherry blossom here by a day but it was still good to see. Then back on underground to Osaka Castle very good day. ...
Only had 1/2 hour, then back on bus to go to "shop" not as advertised and paid for. Got to see barely anything at shrine. Not worth it at all ...
Osaka is great. Problem is, the ship gets in pretty late and by the time you go through immigration, daylight will be getting close to the end.
Hint: Do a ship's tour at your first Japanese port, so you clear immigration quickly and early. After you go through it the first time, the next Japanese stops go much faster. Don't forget to bring a photo copy of your passport. You'll need it! ...