In May's Uncanny Japan you get three Japanese superstitions and why:

1)Please don't cut your nails at night.

2)Please don't whistle at night.

3) Please do kill spiders at night...or don't, actually you might not want to. There's a good argument why you should let those night spiders live.

Notes: The intro/outro music of Uncanny Japan is a song by Christiaan Virant (“Yi Gui” from Ting Shuo).  The whole album is just gorgeous as it everything else by FM3.