Meaning
The kanji 棟 (とう, むね) primarily refers to the ridge of a roof or the ridgepole itself—the topmost, horizontal beam supporting the roof structure. By extension, it also signifies a building or a block of buildings, and functions as a counter for buildings. You'll often encounter this kanji in architectural discussions and documents related to construction or urban planning, as it's a fundamental term.
To understand its meaning better, let's look at its visual composition. 棟 is a 形声文字 (keisei moji - phono-semantic character), formed by combining two elements: the radical 木 (ki), meaning "tree" or "wood," and 東 (higashi), which means "east." The 木 radical clearly signifies the material from which a ridgepole is typically made. While 東 acts as the phonetic component, suggesting the reading トウ (tou), it also subtly hints at the kanji's meaning.
The component 東 is often associated with a "central" or "main" direction; for example, many shrine entrances face east. This subtly reinforces the ridgepole's metaphorical role as the "backbone" of a building. It is the central and most important structural element of a roof. Just as the east is a prominent direction, the ridge is a prominent feature of a roof.
The kanji's shape directly connects to its meaning: it represents the "wood" (木) that forms the "central" or "eastern" (東, which also hints at the sound) part of a structure, specifically the roof's highest point. This makes it easier to grasp why it signifies both the physical ridge and, broadly, a building itself. 棟 has 12 strokes and is classified as an N1 kanji for the Japanese Language Proficiency Test. It is also a Jōyō Kanji, typically learned in secondary school, often informally categorized as being at an 8th-grade level or higher.
Readings
On'yomi (音読み) — Chinese-derived readings
The primary On'yomi (Chinese-derived reading) for 棟 is トウ (TOU). This reading is predominantly used in compound words, particularly when referring to specific types of buildings, sections of a larger building, or architectural ceremonies.
上棟 (jōtō) — erecting the ridgepole (a key stage in construction)
上棟式 (jōtōshiki) — ridgepole raising ceremony; a traditional Japanese ritual to celebrate the completion of a house's basic framework.
病棟 (byōtō) — hospital ward; a specific section or building within a hospital complex dedicated to particular patients or treatments.
校舎棟 (kōshatō) — school building/block; refers to a specific building within a school campus.
高層棟 (kōsōtō) — high-rise building; often used when distinguishing different blocks or sections of a complex.
一棟 (ittō) — one building; acts as a counter for buildings. Notice the sound change (sokuonbin/gemination), where 一 (ichi) and 棟 (tō) combine to form いっとう (ittō) instead of いちとう (ichitō).
Kun'yomi (訓読み) — Native Japanese readings
The main Kun'yomi (native Japanese reading) for 棟 is むね (mune). This reading directly refers to the physical ridge of a roof or the ridgepole itself. You'll often encounter it in traditional architectural terms or when discussing roof structures specifically. It can also appear with okurigana, as in 棟上げ (muneage).
棟 (mune) — ridge of a roof, ridgepole; the highest point of a roof where two slopes meet.
棟木 (munagi) — ridgepole; the main beam at the apex of a roof.
棟上げ (muneage) — ridgepole raising; a ceremony similar to 上棟式, emphasizing the act of raising the ridgepole.
入母屋造りの棟 (irimoyazukuri no mune) — the ridge of a hipped-gable roof; demonstrates its use in specific architectural styles.
棟瓦 (munagawara) — ridge tiles; tiles specifically designed for covering the roof ridge.
Common Words & Compounds
To master 棟 for the N1 level, grasping its usage in various contexts is key. Below is a selection of common words and compounds. They are categorized for easier learning and demonstrate how 棟 is used in both its 'ridge' and 'building' meanings.
Architectural & Construction Terms
上棟式 (jōtōshiki) — ridgepole raising ceremony. This is a traditional Shinto ceremony held when the ridgepole is placed, celebrating the completion of the house framework and praying for its safety.
棟梁 (tōryō) — master builder, foreman, chief carpenter. This term refers to the head craftsman or supervisor of a construction project, often implying great skill and leadership.
棟木 (munagi) — ridgepole. The primary wooden beam that forms the apex of a roof structure.
棟上げ (muneage) — ridgepole raising. The act or ceremony of raising the ridgepole to complete the basic roof frame.
棟瓦 (munagawara) — ridge tiles. Special tiles used to cover and protect the ridge of a tiled roof.
Types of Buildings & Sections
本棟 (hontō) — main building. Used to distinguish the primary structure from annexes or other subsidiary buildings.
別棟 (bettō) — separate building, annex. A building that is distinct from the main structure but often part of the same property or complex.
病棟 (byōtō) — hospital ward. A specific section or block within a hospital dedicated to particular types of patients or medical care.
校舎棟 (kōshatō) — school building/block. Refers to an individual building within a school campus, such as a classroom block or administrative block.
新棟 (shintō) — new building/block. Often used to refer to a recently constructed addition or replacement building within a larger facility.
高層棟 (kōsōtō) — high-rise building. A multi-story building, often part of a complex that might also include lower-rise structures.
研究棟 (kenkyūtō) — research building/block. A building specifically designated for research activities, common in universities or corporate campuses.
Counting Buildings
一棟 (ittō) — one building. This is the common counter for buildings, where 棟 takes on the reading トウ.
二棟 (nitō) — two buildings.
数棟 (sūtō) — several buildings.
Example Sentences
この古い家屋の屋根の棟は、長年の風雨で傷んでいます。
Kono furui kaoku no yane no mune wa, naganen no fūu de itande imasu.
The ridge of this old house's roof is damaged from many years of wind and rain.
昨日、新しい体育館の上棟式が盛大に執り行われました。
Kinō, atarashii taiikukan no jōtōshiki ga seidai ni toriokonawaremashita.
Yesterday, the ridgepole raising ceremony for the new gymnasium was grandly held.
あの病院には、小児病棟と成人病棟の二つの棟があります。
Ano byōin ni wa, shōni byōtō to seijin byōtō no futatsu no tō ga arimasu.
That hospital has two buildings: a pediatric ward and an adult ward.
大学の研究棟は、最新の設備が完備されています。
Daigaku no kenkyūtō wa, saishin no setsubi ga kanbi sarete imasu.
The university's research building is fully equipped with the latest facilities.
再開発エリアには、商業施設と住宅を含む巨大なビルが三棟建つ予定です。
Saikaihatsu eria ni wa, shōgyō shisetsu to jūutaku o fukumu kyodai na biru ga santō tatsu yotei desu.
Three huge buildings, including commercial facilities and residences, are planned to be built in the redevelopment area.
昔の日本家屋では、太い棟木が屋根の構造を支えていました。
Mukashi no Nihon kaoku de wa, futoi munagi ga yane no kōzō o sasaete imashita.
In old Japanese houses, thick ridgepoles supported the roof structure.
病院の新棟は、最新の医療技術を導入し、来月開院する予定だ。
Byōin no shintō wa, saishin no iryō gijutsu o dōnyū shi, raigetsu kaiin suru yotei da.
The hospital's new building, incorporating the latest medical technology, is scheduled to open next month.
職人たちは、安全を祈願しながら、無事に棟上げを終えました。
Shokunin-tachi wa, anzen o kigan shinagara, buji ni muneage o oemashita.
The craftsmen safely completed the ridgepole raising ceremony while praying for safety.
太陽光発電パネルは、通常、南側の屋根の棟に設置されます。
Taiyōkōhatsuden paneru wa, tsūjō, minamigawa no yane no mune ni secchi saremasu.
Solar panels are usually installed on the south-facing ridge of the roof.
Memory Tip
To remember 棟, focus on its components: 木 (ki - wood/tree) and 東 (higashi - east). You can visualize it as the most important wooden beam—the ridgepole—that forms the "backbone" of a building. Imagine a tall, sturdy tree (木) that is chopped down and used to create the central, highest beam of a house.
Imagine this crucial beam, made of wood (木), oriented towards the east (東), symbolizing its primary structural importance. The 東 component can also represent the "center" or "main" direction of a structure. So, you can think of the "wooden backbone" of a building, perhaps aligned with the prominent "east," signifying both the roof ridge and the building itself. Visualize the wood (木) at the very top, much like the sun rising in the east (東) over a building's silhouette.