Meaning
宵 (yoi / shō) means evening or early night — the narrow window after sunset when the sky deepens but the night hasn't fully taken hold. It is not the silent depths of 深夜 (shin'ya), nor the broad darkness of 夜 (yoru). 宵 is more precise: lanterns flicker to life, festival music carries on the cooling air, the street traffic thins. This is the hour of anticipation and gathering, distinct from every other part of the night.
Etymologically, 宵 combines two elements. At the top sits 宀 (ukanmuri), the roof radical, shared by many kanji tied to shelter and enclosure. Beneath it is 肖 (shō), a component suggesting something small or diminishing. As daylight fades and the sun grows small on the horizon, you retreat under the roof of your home. The world outside dims; the warmth inside beckons. Day shrinks; 宵 begins.
Visually, 宵 has a compact, sheltered quality. The arching roof radical crowns the character, while the components below suggest fading daylight. At 10 strokes, it sits at moderate complexity. Classified as grade 8 in the Japanese curriculum — high school level — and N1 on the JLPT scale, 宵 turns up regularly in classical literature, haiku, waka, traditional songs, and cultural phrases tied to the evening hour.
Readings
On'yomi (音読み) — Chinese-derived readings
The on'yomi is ショウ (shō), from Middle Chinese. It appears in formal literary compounds and classical poetry — not casual conversation. Encounter ショウ in a 宵 compound and you're firmly in literary territory. The reading is shared across East Asian traditions, which explains why phrases like 春宵 feel equally at home in Tang poetry and Japanese waka.
- 春宵 (shunshō) — spring evening; best known from Su Shi's verse 春宵一刻値千金 — a moment of a spring evening is worth a thousand gold coins
- 深宵 (shinshō) — the deep of night; a formal literary term for the late, still hours when the world has gone truly quiet
- 秋宵 (shūshō) — an autumn evening; a literary compound conveying the cool, slightly melancholy mood of fall nights, common in classical prose and poetry
- 毎宵 (maishō) — every evening; a formal way of expressing nightly recurrence, rarely heard in everyday speech
Kun'yomi (訓読み) — Native Japanese readings
The kun'yomi is よい (yoi) — the native Japanese word for early evening, and the reading you'll encounter most. Where ショウ belongs to poetry and classical texts, よい is grounded in lived experience: the hour when festival stalls light up, families sit together, and the city settles into a slower rhythm.
- 宵 (yoi) — evening, early night; used alone in poetic and traditional contexts to name the hour itself
- 宵の口 (yoi no kuchi) — early evening; literally "the mouth of the evening" — the very opening of the night
- 今宵 (koyoi) — tonight, this very evening; preferred over 今夜 (kon'ya) in songs, poetry, and romantic contexts for its literary warmth
Common Words & Compounds
宵 appears in compounds spanning time, nature, and social custom. Several carry real cultural weight — Edo-era proverbs, festival traditions, and poetic images that remain alive today.
Time and Atmosphere
- 今宵 (koyoi) — tonight, this very evening; the most common 宵 compound in modern Japanese, preferred over 今夜 in songs, poetry, and romantic writing for its literary warmth
- 宵の口 (yoi no kuchi) — early evening; the opening hours of night, when things have only just begun to darken
- 宵闇 (yoiyami) — the dimness of early evening; the particular quality of dark that settles just after sunset, before true night arrives
- 宵月 (yoizuki) — the evening moon; typically the slender crescent visible in the western sky just after sunset — a classic image in Japanese poetry and woodblock prints
- 春宵 (shunshō) — a spring evening; famous from Su Shi's verse 春宵一刻値千金, which sets the preciousness of a warm spring night in a single line
Cultural Customs and Activities
- 宵祭り (yoimatsuri) — the eve of a festival; the night-before celebrations that often match or exceed the main event, drawing crowds with food stalls, music, and dancing from sundown
- 宵越し (yoigoshi) — carrying something over to the next day; anchored in the Edo saying 江戸っ子は宵越しの金を持たない — Edoites don't hold money overnight. The saying captures the city's pride in spending freely and living in the present
- 宵っぱり (yoippari) — a night owl; someone who habitually stays up late, reluctant to let the evening end
Nature and Literature
- 宵待草 (yoimachigusa) — evening primrose; the flower that opens as darkness falls. Takehisa Yumeji, the Taisho-era artist and poet, immortalized it in a song still sung today
- 深宵 (shinshō) — the deep of night; a literary term for the late, quiet hours after evening has passed
- 秋宵 (shūshō) — an autumn evening; used in poetry and literary prose to convey the cool, reflective mood that settles on fall nights
Example Sentences
今宵は美しい月が出ている。
Koyoi wa utsukushii tsuki ga dete iru.
Tonight, a beautiful moon is out.
宵の口から友人を待っていた。
Yoi no kuchi kara yūjin wo matte ita.
I had been waiting for my friend since early evening.
宵闇が静かに街に忍び込んできた。
Yoiyami ga shizuka ni machi ni shinobi konde kita.
The evening darkness quietly crept into the town.
江戸っ子は宵越しの金を持たないと言われる。
Edokko wa yoigoshi no kane wo motanai to iwareru.
Edoites are said not to keep money overnight — spending freely is a mark of Edo pride.
宵月が西の空に細く輝いていた。
Yoizuki ga nishi no sora ni hosoku kagayaite ita.
The evening crescent moon was shining thin and bright in the western sky.
あの祭りの宵祭りは、本番より賑やかだった。
Ano matsuri no yoimatsuri wa, honban yori nigiyaka datta.
The eve of that festival was even livelier than the main event itself.
彼女は宵っぱりで、いつも深夜まで本を読んでいる。
Kanojo wa yoippari de, itsumo shin'ya made hon wo yonde iru.
She is a night owl who always reads until deep in the night.
春宵一刻、値千金と昔の詩人は詠んだ。
Shunshō ikkoku, atai senkin to mukashi no shijin wa yonda.
A poet of old once wrote: a single moment of a spring evening is worth a thousand gold coins.
今宵こそ、長年の夢を語り合おう。
Koyoi koso, naganen no yume wo katariaou.
Tonight of all nights, let's share the dreams we've held for years.
宵から雨が降り続け、祭りは中止になった。
Yoi kara ame ga furitsuzuke, matsuri wa chūshi ni natta.
It had been raining continuously since evening, and the festival was cancelled.
Memory Tip
To remember 宵, picture a traditional Japanese house at dusk. At the top of the character sits 宀 — the roof radical, shaped like sheltering eaves arching over what lies below. Beneath it is 肖, which contains 小 (small) at its core. The image: the sun grows small and sinks below the horizon, and you retreat under your roof. Day shrinks away; the first darkness gathers; 宵 begins. For the on'yomi ショウ (shō), link it to the English word show — evening is nature's daily show, the slow transition from afternoon light to night. Trace the rooftop arching over the fading brightness in this character: that is 宵.