When the couple are thrown out of the "Swankyfish" restaurant, the man attempts to leave a tip but the chef yells "Tip included!". In fact, tipping in Japan is considered an insult which may explain why he was kicked out again but he was actually kicked out for providing his own soy sauce.
This episode is the second time A Streetcar Named Desire (1951) is referenced. The first time was in A Streetcar Named Marge (1992)
The "Springfield Tire Guide" is a parody of the "Michelin Guide" which gives Michelin stars to outstanding restaurants