Tsuki wa Higashi ni Hi wa Nishi ni

Operation Sanctuary
Cover from the Operation Sanctuary video game
月は東に日は西に
(Tsuki wa Higashi ni Hi wa Nishi ni)
GenreHarem, Romance, Comedy, Fantasy, Science fiction
Video game
DeveloperAugust
PublisherAugust
GenreEroge, Visual novel
PlatformWindows, Dreamcast, PlayStation 2
Released
  • JP: July 20, 2003 (Windows)
  • JP: June 24, 2004 (Dreamcast)
  • JP: October 7, 2004 (PlayStation 2)
Light novel
Written byOkada Runa
Illustrated byBekkankō
Published byHarvest
Original runMarch 25, 2004May 25, 2004
Volumes3
Anime television series
Directed byShōsei Jinno
Produced by
  • Tsuneo Takechi
  • Asuka Yamazaki
  • Makoto Nakamura
  • Toshio Hatanaka
  • Takashi Mizukami
  • Hiroshi Nomura
  • Tomoko Takayama
Written byMitsuhiro Tōgō
Music byAkifumi Tada
StudioRadix Ace Entertainment
Original networkAT-X
Original run June 30, 2004 September 22, 2004
Episodes13
Original video animation
Operation Sanctuary+
Directed byShōsei Jinno
Written byMitsuhiro Tōgō
Music byAkifumi Tada
StudioRadix Ace Entertainment
ReleasedDecember 12, 2004
Runtime12 minutes each
Episodes4
Light novel
Tōhonseisō School Life
Written byKano Kiichi
Illustrated byBekkankō
Published byGakken
PublishedDecember 25, 2004
Volumes1
Manga
Written byTakeda Mika
Published byASCII Media Works
MagazineDengeki G's Magazine
PublishedJanuary 27, 2005
Volumes1

Operation Sanctuary, known in Japan as Tsuki wa Higashi ni Hi wa Nishi ni (月は東に日は西に; lit. The Moon in the East, The Sun in the West) or Hani Hani (はにはに) for short, is a Japanese adult visual novel developed by August. It was released on July 20, 2003, for Windows using the NScripter engine. The Dreamcast and PlayStation 2 versions were released by Alchemist in 2004. An anime adaptation was broadcast in Japan in 2004, and originally ran from June 30, to September 22.The title references a haiku by Yosa Buson: "Nanohana ya tsuki wa higashi ni hi wa nishi ni."

ASCII Media Works published a manga adaptation for on January 27, 2005, serialized in Dengeki G's Magazine. Multiple light novels based on the game have also been published. Geneon Universal has produced several drama CDs.