THE ENIGMA OF AMIGARA FAULT by Junji Ito
GYO by Junji Ito
HUMAN CLOCK by Tokunan Seiichiro
PHANTOM STALKER WOMAN / ZASHIKI ONNA by Minetaro Mochizuki
SALARYMAN FROM HELL by Ebisu Yoshikazu
(from around 60's or 70's)
Actually there still a lot of manga, but it's done for now. I still not give any manga from the greatest horor mangaka which is Kazuo Umezu / UMEZZ. Well next year maybe.