>>38979969Well you see, Yukichi is the name of the man on a large-value yen bill, so they are called Yukichis, just like Americans call 100 dollar bills benjamins as they feature a picture of Benjamin Franklin.
So people may say they "have Yukichi's" to mean they have alot of money, From here, "I like yukichis" means " I like money", and has been shortened in slang form from Yukichis to cheese, which works pretty well since money is also sometimes referred to as "cheddar"