Dog,

Try Den Den town, the giant electronics shopping area just 2 blocks east of Namba. You won't get bargains, but you'll find anything at all you're looking for.

There are many Japanese hot springs around Osaka, check with your hotel for one nearby. They're a fun way to kill time.

For drinking holes, I like Sam & Dave and Pig and Whistle. Check the Blue Note Jazz Cafe for large acts in town like Peabo Bryson, Bobby Caldwell, etc.. they're there alot. Make sure you bring your wallet.

Have fun!