Yeah, a lot of times the J relatives were getting called up in Japan and shaken down for cash, lots of other times they were willingly coughing it up. Years ago, cash from the Pachinko biz was VERY hard to trace --it was virtually all cash. Finally, the authorities made accountability much better.
Grilled meat places are often Korean-owned, and those owners get targeted as cash-cows a lot, too, by the DPRKs.