From a chapter on "Some Queer Japanese Superstitions" in The Nightless City: Geisha and Courtesan Life in Old Tokyo:
Sneezing denotes:-
Once,-Some person is secretly praising you;
Twice,-Some person is backbiting you;
Thrice,-Some person is in love with you;
Four times,-You have caught a cold.

My mother was not a particularly superstitious person, but one piece of lore she did pass on to me was that to the Chinese, 8 is a lucky number.

...Hey, let’s see if I can fiddle with the date setting for this entry...