If in some yet-to-be-explained plot twist the British TV show "Downton Abbey" winds up in Osaka, expect Kitahama Retro to play a starring role. It's period perfect — right down to the maid in her pinafore, the linen curtains, silver-service tea sets and giant egg omelet sandwich. It's a recipe for kitsch, but Kitahama Retro takes imitation so earnestly it rises above kitsch.