Komorebi — the Japanese word for light that filters through the leaves
木漏れ日 (komorebi) is sunlight that has filtered through the branches and leaves of a tree, along with the patches and glints it casts on the ground. It is an ordinary word in modern Japanese: it appears in dictionaries and is used in daily life, not only in poetry. There is no single-word equivalent in English — only descriptions like "sunlight dappled through the leaves" — and the same is true for other languages.
The word "komorebi" circulates online with the caption "that untranslatable Japanese word." Let's break down which three ordinary characters it is actually made of and why the myth of untranslatability emerged in the 2010s. We'll also look at the ordinary situations in which Japanese speakers themselves use it — not only in poems, but in a photo caption or the name of a building.
Light that flows through the leaves, not just "shines"
木漏れ日 is sunlight that filters through the branches and leaves of a tree and falls to the ground in patches and glints. It is an ordinary word, not a poetic term: you can find it in dictionaries and hear it in everyday speech when people talk about light in a park or a courtyard.
Why the patches of light are always round
This phenomenon has an optical explanation: the gaps between the leaves act like the aperture of a camera obscura, so the patches on the ground always take the shape of the sun — that is, they are round, whatever the shape of the gap itself. During a partial solar eclipse, komorebi on the asphalt looks like a scattering of crescents — the same effect.
Three ordinary characters: 木, 漏れ, and 日
The word is built on an ordinary pattern that is transparent to any Japanese speaker: 木 "tree" plus 漏れ — the form of the verb 漏れる "to seep" — plus 日 "sun, daylight." A native speaker hears in こもれび not a term but an ordinary description: the light of the tree that has leaked out.
漏 — значение: to leak, to seep, leak, leakage — онъёми: ロウ — кунъёми: も.る、も.れる、も.らす — 14 штрих(ов). 漏 appears in the word in the form 漏れ: the light does not "shine" or "fall" but specifically flows through the foliage, like water through a crack. The same character appears in 雨漏り (amamori) "roof leak" and 漏電 (rōden) "electrical leak."
Why the reading voices: hi becomes bi
When combined into a single word, the consonant at the junction of the parts becomes voiced — a common phenomenon in Japanese called rendaku. The character 日 on its own is read ひ (hi), but in こもれび it becomes び (bi). Without this shift, the word would sound unusual to a Japanese ear.
| Japanese | Reading | Translation |
|---|---|---|
| 木漏れ日 | komorebi · komorebi | Light that has seeped through the leaves |
| 漏れる | moreru · moreru | To seep, to leak |
| 雨漏り | amamori · amamori | Roof leak |
| 漏電 | rōden · rōden | Electrical leak |
Trace 漏 along the guides — the character of "seeping," without which the word "komorebi" cannot be assembled.
Why you shouldn't write "a word that exists in no other language"
A formula circulates online: "Japanese has a word that exists in no other language." It is inaccurate. English cannot name this phenomenon with a single word, but it describes it without difficulty — "sunlight dappled through the leaves," "the play of light in the canopy." The same is true for other languages: there is no one-word equivalent there either.
Where the legend of untranslatability came from
It was precisely the absence of an English equivalent that spread こもれび across the internet. In 2014, Ella Frances Sanders published the illustrated book "Lost in Translation" with a list of words without a direct English translation, and komorebi appeared there alongside wabi-sabi. From there the word spread through lists of "untranslatable words," which are usually compiled not by native speakers but by foreigners studying the language from the outside.
The word itself is structured quite ordinarily: three everyday characters, no hidden philosophy. What is unusual is not the construction but the fact that it fits into one short word rather than a whole phrase.
A photo caption, not just a line of haiku
In ordinary Japanese speech, "komorebi" appears in the same places as the English word "dappled light": under a photo of a forest on social media, in the name of a café or a residential complex. Seasonal columns about nature in newspapers and blogs also like such a name — it sounds homey and cozy. Poetic use in poems and songs also exists, but it is not the only or even the main environment for the word.
A second spelling: 木洩れ日
The word has a variant spelling 木洩れ日 — with a different character instead of 漏れ, but with the same reading こもれび and the same meaning. Dictionaries consider 木漏れ日 the main form; the second is rarer, and readers should not be confused by it.
FAQ
- What does the Japanese word "komorebi" mean?
- Komorebi (木漏れ日) is sunlight that has filtered through the branches and leaves of a tree, along with the patches and glints it casts on the ground. It is an ordinary Japanese word, not a poetic term: it appears in dictionaries and is used in everyday speech about light in a park or a courtyard.
- How is the word "komorebi" written and read?
- It is written 木漏れ日 and read こもれび. The word is made of three parts: 木 "tree," 漏れ — the form of the verb 漏れる "to seep," 日 "sun." At the junction of the parts, 日 (hi) becomes voiced to び (bi) — a common phenomenon in Japanese called rendaku.
- Is it true that komorebi is an untranslatable word?
- Not exactly. English has no single word for this phenomenon, but it has descriptions: "sunlight dappled through the leaves." The word spread around the world largely thanks to English-language "untranslatable words" lists of the 2010s, not because it is structured in any special way.
- How does komorebi differ from ordinary sunlight?
- Komorebi is not just any sunlight, but specifically the light that has been filtered through the leaves of a tree and falls in patches and glints. The patches are always round regardless of the shape of the gap between the leaves — an optical effect similar to how a camera obscura works.
- Is there another spelling of the word "komorebi"?
- Yes, there is a spelling 木洩れ日 with a different second character, but with the same reading こもれび and the same meaning. Dictionaries consider 木漏れ日 the main form, and 木洩れ日 a variant that is used less often and should not be confused with a typo.
- When did the word "komorebi" enter English?
- An exact date cannot be given. The word entered English not directly from Japanese but through the same wave of English-language "untranslatable words" lists of the 2010s that brought it to other languages as well. Before that wave, it was almost never encountered in English texts.
Sources
Updated: 2026-09-21