"Fun Fun Factory" is by Watanabe Yoshitomo, and is published by Hakuensha. It runs in the monthly magazine LaLa. Below I will list the tankoubon information as it becomes available :)

	Fun Fun Factory Volume 1 By Watababe Yoshitomo ISBN4-592-17136-5 390 yen, Published 5-10-2001
	Fun Fun Factory Volume 2 By Watababe Yoshitomo ISBN4-592-17137-3 390 yen, Published 12-10-2001
	Fun Fun Factory Volume 3 By Watababe Yoshitomo ISBN4-592-17138-1 390 yen, Published 08-10-2002
	Fun Fun Factory Volume 4 By Watababe Yoshitomo ISBN4-592-17139-X 390 yen, Published 01-10-2003