Googled something like "cheap Japanese BBQ Osaka" (because spending $100 on Kobe beef is like nope) and this blog post about Susumu came out and it turned out to be THE. BEST. I love you Susumu and the kind guy who used Google Translate to explain to me what all the different kinds of beef was.

It's in some corner near the Tenjimbashi street. A tiny shop with a trendy-ish vibe, you have to stand and eat. They'll give you this small charcoal grill (one for 2-3 people) and you order small plates of meat to grill slowly on it.