Actually looks more insect-like. Maybe there is a species of insect which lays eggs on spider nests? In my opinion, unless I hear otherwise, I think Occam's Razor cuts to the theory that these are spider eggs. I would love to hear anyone else's thoughts, whether you are an expert or not, actually.
spider webspider egg
From JAN 2, 2012: EAST OF BANZAI (JAPANESE BUNKER AREA)