PuniCodex

The Living Myth

月読 Tsukuyomi

Moon God, Shintō · Night-watcher of the lunar realm

Tier 2 Tsukuyomi
Tsukuyomi — Moon God, Shintō
01

Mythology

Stories of Tsukuyomi

Tsukuyomi's mythology is the shortest dossier of the three celestial siblings, and the chronicles themselves treat him as an afterthought. What survives is one birth, one killing, and one eternal estrangement — enough to divide the sky.

The Birth

From the Right Eye of Izanagi

After his escape from Yomi, Izanagi washed away the pollution of the underworld, and the three great sovereign deities came from his face: Amaterasu from the left eye, Tsukuyomi from the right eye, and Susanoo from the nose (Kojiki 1). Izanagi appointed Amaterasu to rule the day and Tsukuyomi the night, dividing the luminous and dark halves of the world between the siblings. Where Amaterasu received her father's necklace and the highest heaven, Tsukuyomi received no emblem — a first hint of how thin his dossier would remain. His name joins tsuku, the moon, with yomi, read as 'night' or as 'counting,' the deity who numbers the months. The myth establishes the moon as the sun's twin: born in the same instant of purification, ruling the complementary half of the sky.

The Killing

The Feast of Uke-mochi

Amaterasu heard of a wondrous goddess of food, Uke-mochi, and sent Tsukuyomi to look upon her. Uke-mochi turned toward the land and from her mouth and body produced a banquet — boiled rice, millet, and every grain (Kojiki 1). Tsukuyomi was revolted: a meal that issued from a body was pollution itself, and he drew his blade and killed her. Amaterasu's anger was immediate and eternal — she declared him an evil god she would never again face, and from that moment the sun and moon kept separate courses. From Uke-mochi's slain body the useful world sprang: silkworms from her head, rice from her eyes, millet from her ears, beans from her nose, wheat and soy from her lower body (Nihon Shoki 1). The myth weighs purity against fecundity: the moon's fastidious blade cuts the night off from the very source of food.

The Separation

Why Sun and Moon Never Meet

The Kojiki gives no further adventures of Tsukuyomi — his entire narrative after the killing is one sentence of divine estrangement. Amaterasu, as sovereign of the day, pronounced the sentence; the moon god departed, and the chronicle lets him go without a shrine, a child, or another deed. Later readers noticed the astronomy already inside the story: the moon that strikes down the goddess of food is the moon that rules the night in which nothing grows; the sun that refuses to see him is the sun under whose gaze the five grains ripened from Uke-mochi's body. The separation is thus both an eternal feud and a daily rotation — estrangement written across the sky as the alternation of day and night, the celestial siblings meeting only at the thresholds of dawn and dusk, and never face to face.

The Variants

A God at the Edge of the Record

The compilers of the Nihon Shoki reproduce several variant accounts of the celestial birth, and their disagreements are themselves informative: the recensions differ in the occasion of the washing and in small details of order, and one tradition lets Tsukuyomi's name be read as 'moon-counter,' the deity who numbers the months; the Kojiki grants him the grand style Tsukuyomi-no-mikoto, 'His Augustness Moon-Night,' and then never uses it again. No variant gives him a further myth. The scholarly conclusion is sober: unlike his siblings, Tsukuyomi attracted no cycle of tales — perhaps, as some have argued, because the moon's waxing and waning were read through other divinities in the popular cults. His faintness in the record is the most distinctive thing about him: the god of the night keeps to the edges of the text, exactly as the moon keeps to the edges of the day.

02

Moon God of the Night

Lunar Order, Separation, and Celestial Sibling

Tsukuyomi is the moon kami of Japanese myth, born from Izanagi's right eye when the creator washed away the pollution of Yomi. He rules the night and the counting of months, and his entire narrative turns on a single act of violence that separated him forever from the sun.

Moon God

Ruler of the night sky and the lunar calendar that numbers the months.

Sibling of Amaterasu

Born with her from Izanagi's purification — the night's twin of the day.

Night Ruler

He governs the realm opposite the sun, where nothing ripens.

Separated Deity

His killing of Uke-mochi divided him from Amaterasu into day and night.

Sacred Symbols

Moon The luminous body he rules; in court poetry the moon outshines every other image of the sky
Night The dark half of the cosmic day; his estrangement from the sun fixed its boundary
Blade The weapon with which he answered Uke-mochi's feast — purity's fatal fastidiousness
Crescent Waxing and waning; the counting of months that his name may encode
The five grains Rice, millet, beans, wheat, and soy born from Uke-mochi's slain body — food that his night can never ripen
04

The Name

From the original script to the living URL

Original Script

月読

The name in its original Japanese form. Tsukuyomi (月読) is attested in the source tradition — “Moon reader”. Its original diacritics and script distinctions carry the full phonetic and orthographic weight of the source tradition.

ASCII Constraint

tsukuyomi

The plain tsukuyomi form is identical to the Unicode restoration. Because this name is already written in Latin letters, no diacritics, stress, or script information were lost — only capitalization differs.

Unicode Restoration

Tsukuyomi

The Unicode restoration does not need to recover lost marks for Tsukuyomi. Its value is canonical spelling and consistent cataloguing, not the reconstruction of erased orthography. The domain is readable as-is to both DNS and humanity.

ASCII-Clean Name
Tsukuyomi.com

This restoration is written entirely in ASCII letters — no Punycode encoding stands between Tsukuyomi and the DNS. The domain reads identically to machines and to human eyes.

05

Name Variations

Owned, ideal, and ASCII forms of Tsukuyomi

Canonical Restoration

Tsukuyomi

Restores 月読. The full Unicode restoration. tsukuyomi.com is not in the PuniCodex collection — it is watched for release; if it drops, this temple upgrades to an owned flagship.

06

Pronunciation

How Tsukuyomi was spoken

/tsɯ.kɯ.jo.mi/ Modern Standard Japanese (Hepburn)
Tsu- Voiceless alveolar affricate [ts] plus close back unrounded [ɯ]; from 月 'moon/month'
-ku- Voiceless velar stop [k] plus close back unrounded [ɯ]
-yo- Palatal approximant [j] plus open-mid [o]; from 夜 'night' or 読 'to read/count'
-mi Bilabial [m] plus close front [i]
07

Original Script & Provenance

How Tsukuyomi is preserved in writing

月読
Original Script

A bespoke provenance study for Tsukuyomi is being prepared by the PUNICODEX scholarly team.

Contribute scholarly provenance →
Go Deeper

Extended Lore

The lore you have read is the living myth. Extended Lore opens the scholarly vault beneath it: the cult and its material remains, a history of the image, the name after antiquity, a meditation on what the name still means, and the full scholarly apparatus — etymology, orthography, sources.

Enter Extended Lore
Tsukuyomi mascot