Hello there!
I just noticed that most users can't tell the difference between these tags, so I will elaborate:
Zouri - These sandals are usually in paired with kimonos or any Japanese-related clothing. (e.g. post #2981125, post #4869070, post #7109030)
Okobo - These sandals are just like zouri but with platforms. (e.g. post #3738930, post #1226672, post #4476962)
Geta - These sandals have wooden base with two "teeths". (e.g. post #152581, post #295447, post #361448)
Tengu-geta - Just like Getas, but with only one "teeth".
Flip-flops - These sandals are usually worn during summer or casual clothing. (e.g. post #480446, post #5389065, post #4645635)