Madoka's blurred face

Luna Sedata Syndrome (月幽病 Getsuyuubyou) is a disease featured in Fatal Frame IV: Mask of the Lunar Eclipse. The disease is featured prominently in the game, and is the driving force behind the island's mysterious deaths and a facet of the islanders' culture.

Background[edit | edit source]

The Luna Sedata Syndrome is a condition specific to the Rougetsu Island, the disease is incommunicable and does not spread further. It shows symptoms such as memory loss, sleepwalking and "Dancing as if possessed" as the disease advances. The syndrome looks somewhat related to the Moon too, because depending on the phase of the moon, the patients' behavior would change.

When the moon is full, the patient would be calm, but often seek windows or rooftops to be exposed to the moonlight, they say that they feel like they recollect the memories they have lost while bathing in moonlight.

And when there is a lunar eclipse, their conditions worsen. They lose themselves even more, sleepwalk and sometimes become delirious.

The Luna Sedata Syndrome is also related to the failed Kagura Dance/Ritual that caused the happenings of Fatal Frame IV.

Stages[edit | edit source]

There are four stages in the Luna Sedata Syndrome:

Budding[edit | edit source]

Budding is the first stage of the Luna Sedata Syndrome. The patients in this phase tend to be afraid of mirrors, water, or anything that can show their reflection. It is believed that they do so because they cannot recognize their faces, as if the reflection was showing someone else's face.

Breaking[edit | edit source]

In the second stage, victims of Luna Sedata Syndrome begin to lose their sanity. It starts with their increased paranoia and confusion about what's happening around them. They may also begin to start hearing voices or noises that no one else can hear.

Resonance[edit | edit source]

In the third stage, when a patient sees the face of a patient in a more severe condition, the symptoms get transferred. This is called the "Resonance". For example: If a patient is "budding"and the patient sees another patient who is "blooming", the patient who is "budding" will start "blooming".

It might be the contagious form of the Luna Sedata Sydrome.

Blooming[edit | edit source]

Blooming is the fourth and final stage of Luna Sedata Syndrome and it is somewhat connected to the failed Kagura

Ritual. Patients in this state would see their face blurred when they look at themselves. They are the only ones who can see their faces looking this way. Also, when the person who "Bloomed" will be killed, their ghost would have their faces blurred.

Known victims[edit | edit source]

Rougetsu Hall[edit | edit source]

Ayako Haibara

Iori Aiba

Kageri Sendou

Kazuto Amaki

Madoka Tsukimori

Sakuya Haibara

Yoriko Sonohara

Yuukou Magaki

Haibara Hospital/unknown[edit | edit source]

Asagi Hizuki

Himiko Kiriya

Katsuhito Kariya

Kyouko Kitazume

Natsuki Shiono

Sanae Houzuki

Tadayuki Kaido

Takashi Aiba

Tomoko Hinuma

Yuuzou Takemura

Sakuya's Mother

Outpatients[edit | edit source]

Marie Shinomiya

Tomoe Nanamura

Survivors[edit | edit source]

Ruka Minazuki - survival confirmed in both endings

Misaki Asou - 1st ending: unknown fate - 2nd ending: survival confirmed

Died in surgery[edit | edit source]

Asagi Hizuki

Trivia[edit | edit source]

  • The original name, Getsuyuubyou can be translated as "tranquil moon disease" or "secluded moon disease". Although no specific translation is pointed out, the name may refer to how patients enter a state of tranquility while viewing the moon. It might also refer to the disease's relation to lunar eclipses.
  • Luna Sedata Syndrome is likely a fictional combination of the words "luna" and "sedate". These, in turn, are derived from the Latin words for moon (lūna) and calm/tranquil.
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