Directed by Kihachi Okamoto (SWORD OF DOOM [1966] and KILL! [1968]), this hard-to-see Japanese sci-fi drama ranks as one of the stranger major studio productions I've ever come across. UFO's are sighted on Earth and encounters with them inexplicably cause people's blood to turn blue.
http://www.wtf-film.com/roundtable_links/blue_christmas.html
Kindest regards,
Kevin P.
http://www.wtf-film.com