Meaning
The kanji 坪 (tsubo) primarily refers to a traditional Japanese unit of area. One 坪 is approximately 3.31 square meters (exactly 3.3058 m²), or roughly 35.6 square feet (3.95 square yards). This unit historically derived from the area of two standard 畳 (tatami) mats, making it an intuitive measurement for traditional Japanese living spaces. Beyond its role as a unit of measurement, 坪 also refers to a small garden, patio, or courtyard. These are often enclosed within a house or building, typically known as a 坪庭.
The etymology of 坪 offers an interesting insight. It is a phono-semantic compound. The radical 土 (do/tsuchi), meaning 'earth' or 'soil,' provides the semantic component, connecting the kanji to land or ground. Its phonetic component is thought to come from 平 (hei/taira), meaning 'flat' or 'level.' Combined, these components evoke a 'flat piece of earth' or a 'level plot of ground.' This idea of a defined, level area naturally led to its use as a standard unit for measuring land or for a specific, prepared space such as a garden.
Visually, 坪 combines the radical 土 at the bottom with a simplified component at the top, similar to 平. This top part can be interpreted as a 'cover' or a 'defined boundary,' enclosing or delineating the 'earth' below. This visual imagery reinforces the concept of a specific, measured plot of land or an enclosed space, like a garden or patio. Despite its simple appearance, 坪 holds deep cultural significance in Japanese architecture and real estate.
With 8 strokes, 坪 is not a designated Joyo (common use) kanji. However, it frequently appears in contexts related to real estate, architecture, and traditional Japanese culture, making it important for JLPT N1 learners. It is therefore assigned a grade level of 0, meaning it is typically learned at an advanced level, beyond elementary school.
Readings
On'yomi (音読み) — Chinese-derived readings
The kanji 坪 has no commonly used On'yomi (Chinese-derived readings) in modern Japanese. While its phonetic component may historically link to readings like 'hei' from 平, these are not actively used for 坪 itself in everyday or specialized contexts. Consequently, 坪 is almost exclusively read with its Kun'yomi.
Kun'yomi (訓読み) — Native Japanese readings
The primary and virtually exclusive reading for 坪 is つぼ. This reading is fundamental in Japanese, especially when referring to the traditional unit of area. It is also used, though less frequently, to describe a garden or patio.
つぼ (tsubo) — This is the most common and essential reading. It refers to the traditional unit of area (approximately 3.3 square meters). It also describes a small, enclosed garden or courtyard, often found within traditional Japanese houses.
一坪 (hito-tsubo) — one tsubo (e.g., 一坪の土地 - one tsubo of land)
坪数 (tsubo-sū) — area measured in tsubo, or the number of tsubo (e.g., 土地の坪数 - land area in tsubo)
坪庭 (tsubo-niwa) — courtyard garden, patio garden (e.g., 京町屋の坪庭 - a courtyard garden in a Kyoto townhouse)
Common Words & Compounds
You'll most often encounter 坪 in contexts related to real estate, land measurement, and traditional Japanese architecture. Understanding these compounds is vital for advanced Japanese learners.
一坪 (hito-tsubo) — This refers to one tsubo unit. It's commonly used when discussing the size of small plots of land or individual room dimensions, especially in a traditional context. For instance, a small apartment might be described in terms of its tsubo count.
坪数 (tsubo-sū) — This compound indicates the area measured in tsubo. It's a standard real estate term for describing the size of land or building floor space. For example, a real estate listing often specifies the 土地 (land) 坪数.
坪単価 (tsubo-tanka) — Meaning 'price per tsubo,' this is a key term in Japanese real estate. Property values, particularly for land or houses, are often quoted as a price per tsubo. This allows for straightforward comparison between different properties.
建坪 (tate-tsubo) — This term denotes the building area or the footprint of a building on its lot, measured in tsubo. It specifies how much of the land the building itself covers, excluding areas like gardens or parking.
延べ坪 (nobe-tsubo) — This refers to the total floor area of a building, including all floors, expressed in tsubo. It provides a comprehensive measure of the total usable space within a multi-story structure.
敷地坪数 (shikichi-tsubo-sū) — This compound specifies the total area of the building site or plot of land, measured in tsubo. It's an important figure for property assessment and development planning.
坪庭 (tsubo-niwa) — This term describes a courtyard garden or patio garden. Typically, it's a small, enclosed garden within a house, often providing light and greenery to interior rooms. You'll commonly find these in traditional Kyoto townhouses (町屋).
坪飾り (tsubo-kazari) — This refers to decorations or ornamental arrangements specifically designed for a 坪庭. Examples include small stone lanterns, water basins, or carefully placed plants.
坪型 (tsubo-gata) — Meaning 'tsubo shape' or 'pot shape,' this can describe something small and enclosed, like a traditional pot or a small, confined space.
坪刈り (tsubo-gari) — Literally 'tsubo cutting,' this refers to harvesting a small, defined area of a crop (often rice) to estimate the total yield. It's an agricultural sampling method.
Example Sentences
日本では土地の面積を坪で表すことがよくあります。
Nihon de wa tochi no menseki o tsubo de arawasu koto ga yoku arimasu.
In Japan, it is common to express land area in tsubo.
京都の町屋には小さな坪庭があるのが特徴です。
Kyōto no machiya ni wa chiisana tsubo-niwa ga aru no ga tokuchō desu.
A small courtyard garden (坪庭) is a characteristic feature of Kyoto townhouses.
建坪が25坪の一戸建てを購入しました。
Tate-tsubo ga nijūgo tsubo no ikkodate o kōnyū shimashita.
I bought a detached house with a building area of 25 tsubo.
不動産の広告では、面積が坪数と平方メートルで併記されています。
Fudōsan no kōkoku de wa, menseki ga tsubo-sū to heihō mētoru de heiki sarete imasu.
In real estate advertisements, the area is listed in both tsubo and square meters.
畳2枚分が約1坪に相当します。
Tatami ni mai bun ga yaku ichi tsubo ni sōtō shimasu.
Two tatami mats are roughly equivalent to one tsubo.
彼は限られた坪数の土地を最大限に活用して家を建てました。
Kare wa kagirareta tsubo-sū no tochi o saidai-gen ni katsuyō shite ie o tatemashita.
He maximized the use of the limited land area (in tsubo) to build his house.
このアパートは駅から近いので、坪単価がとても高いです。
Kono apāto wa eki kara chikai node, tsubo-tanka ga totemo takai desu.
This apartment is close to the station, so the price per tsubo is very high.
農家は収穫量を推定するために、一部の畑で坪刈りを行います。
Nōka wa shūkakuryō o suitei suru tame ni, ichibu no hatake de tsubo-gari o okonaimasu.
Farmers conduct small-scale harvesting (坪刈り) in a portion of their fields to estimate the yield.
Memory Tip
To remember 坪, visualize its components. The bottom part is the radical 土 (earth, soil). The top part, resembling a stylized 'ワ' with a dash, is a simplification derived from 平 (flat, level). Imagine a surveyor marking off a 土 (patch of earth) on a 平 (flat) surface. The top component acts like a 冖 (a boundary or cover), defining and flattening that specific area. This 'flat piece of earth' then becomes a standard unit of measurement, or a distinct, often small, garden space like a patio. So, think of it as measuring out a 'soil' plot on a 'flat' surface to create a 坪庭 (courtyard garden).