Meaning
The N2 kanji 腹 (hara/fuku) primarily refers to the 'belly,' 'abdomen,' or 'stomach.' Yet, its meaning extends far beyond simple anatomy. In Japanese, it often encompasses abstract concepts like 'mind,' 'heart,' 'courage,' or 'true intentions' in various expressions. Grasping this duality between its physical and metaphorical senses is key to truly understanding 腹.
Etymologically, 腹 is a 形声文字 (keisei moji), or phono-semantic compound. It consists of two parts: the radical 月, also called 肉月 (nikuzuki). When this radical appears on the left side of a kanji, it signifies 'flesh,' 'body,' or 'body part,' directly linking 腹 to the physical body. The other component is 復, which serves as the phonetic element, suggesting the fuku reading. It also carries meanings like 'to return' or 'to repeat.' While the connection between 'return' and 'belly' isn't immediately obvious, some theories propose it relates to the cyclical nature of digestion, or perhaps the belly's role as a central point where things 'return' or converge.
Visually, the 月 radical clearly anchors 腹 to its anatomical meaning. You can imagine the curve of the moon (月) representing the shape of the human torso or abdomen. The character has 13 strokes, making it moderately complex to write. Though a 常用漢字 (Jōyō kanji), it isn't assigned to a specific elementary school grade (1-6). This indicates it's typically learned in junior high or later, fitting its JLPT N2 classification.
Readings
On'yomi (音読み) — Chinese-derived readings
The primary On'yomi (Chinese-derived reading) for 腹 is ふく (fuku). This reading appears almost exclusively in compound words, particularly in more formal or medical contexts.
- 腹痛 (fukutsū) — stomachache, abdominal pain. This is a common medical term for stomach pain.
例：昨日から腹痛がひどくて、仕事を休みました。
(Kinō kara fukutsū ga hidokute, shigoto o yasumimashita.)
I had a terrible stomachache yesterday, so I took the day off work.
- 空腹 (kūfuku) — hunger, empty stomach. This describes the state of being hungry.
例：一日中何も食べていないので、今は空腹だ。
(Ichinichijū nani mo tabete inai node, ima wa kūfuku da.)
I haven't eaten anything all day, so I'm hungry now.
- 満腹 (manpuku) — full stomach, satiety. It is the opposite of 空腹.
例：焼肉を食べすぎて、満腹で動けません。
(Yakiniku o tabesugite, manpuku de ugokemasen.)
I ate too much yakiniku and now I'm so full I can't move.
Kun'yomi (訓読み) — Native Japanese readings
The primary Kun'yomi (native Japanese reading) for 腹 is はら (hara). This reading is very versatile, appearing both as a standalone word and in many common compounds and idiomatic expressions. It can refer to the physical abdomen. However, it also carries significant metaphorical weight, often representing one's inner thoughts, feelings, or courage.
- お腹 (onaka) — stomach, belly. This is the most common everyday term for the stomach, typically used with the honorific prefix 'o-.'
例：寒くてお腹が冷えました。
(Samukute onaka ga hiemashita.)
My stomach got cold because of the cold weather.
- 腹を立てる (hara o tateru) — to get angry. A common idiom where 'hara' refers to one's emotions.
例：彼の言動に私は腹を立てた。
(Kare no gendō ni watashi wa hara o tateta.)
His words and actions made me angry.
- 腹黒い (haraguroi) — black-hearted, wicked, malicious. It describes someone with evil or malicious intentions.
例：彼は見た目は良いが、実は腹黒い人だ。
(Kare wa mitame wa yoi ga, jitsu wa haraguroi hito da.)
He looks good, but he's actually a black-hearted person.
Common Words & Compounds
The versatility of 腹 is evident in the diverse words and expressions it forms. These cover everything from physical aspects and emotional states to social interactions.
Body and Medical Terms
腹部 (fukubu) — abdomen. A more technical or medical term for the abdominal region.
腹筋 (fukkin) — abdominal muscles. These are the abdominal muscles, often discussed in the context of exercise.
下腹 (shitabara) — lower abdomen. This refers specifically to the area below the navel.
上腹 (uwabara) — upper abdomen. This refers to the area above the navel.
腹巻 (haramaki) — belly band, stomach warmer. A traditional Japanese belly band or stomach warmer, worn around the waist.
Expressions of Feelings and Personality
腹を割る (hara o waru) — to speak frankly, to open one's heart. Literally 'to split one's belly,' this implies speaking with complete honesty.
腹が減る (hara ga heru) — to get hungry. A common way to express feeling hungry.
腹を括る (hara o kukuru) — to brace oneself, to be resolved. Literally 'to tie up one's belly,' this idiom expresses determination or resolution.
腹の内 (hara no uchi) — one's true intentions, inner feelings. Refers to one's true intentions or inner feelings, what one holds 'inside their belly.'
Everyday Phrases and Figurative Language
腹一杯 (haraippai) — full stomach, to one's heart's content. It means 'full stomach' (after eating), but can also broadly refer to doing something to one's heart's content.
腹ごしらえ (haragoshirae) — preparing for a meal, a snack before a main meal. Literally 'belly preparation,' this means preparing for a meal or having a snack before a main meal.
腹違い (harachigai) — half-brother/sister (from different mothers). Literally 'different bellies,' this refers to half-siblings (from different mothers).
Example Sentences
今朝からお腹が痛いので、病院へ行きます。
Kesa kara onaka ga itai node, byōin e ikimasu.
My stomach has been hurting since this morning, so I'm going to the hospital.
食後は満腹で、少し眠たくなりました。
Shokugo wa manpuku de, sukoshi nemutakuninarimashita.
After the meal, I was full and felt a little sleepy.
彼の言動には、正直腹が立ちます。
Kare no gendō ni wa, shōjiki hara ga tachimasu.
Honestly, his words and actions make me angry.
大事な話なので、腹を割って話しましょう。
Daiji na hanashi nanode, hara o watte hanashimashō.
It's an important discussion, so let's speak frankly.
富士山に登るために、しっかり腹ごしらえをしました。
Fujisan ni noboru tame ni, shikkari haragoshirae o shimashita.
I prepared myself with a good meal to climb Mt. Fuji.
新しい仕事に挑戦するため、腹を括って決断しました。
Atarashii shigoto ni chōsen suru tame, hara o kukutte ketsudan shimashita.
To challenge myself with a new job, I braced myself and made a decision.
彼の提案は魅力的だが、腹の内が読めない。
Kare no teian wa miryokuteki da ga, hara no uchi ga yomenai.
His proposal is attractive, but I can't read his true intentions.
健康のために、毎日腹筋を鍛えることを習慣にしています。
Kenkō no tame ni, mainichi fukkin o kitaeru koto o shūkan ni shiteimasu.
For my health, I make it a habit to train my abdominal muscles every day.
空腹を感じるたびに、次の食事がより楽しみになります。
Kūfuku o kanjiru tabi ni, tsugi no shokuji ga yori tanoshimi ni narimasu.
Every time I feel hungry, I look forward to the next meal even more.
Memory Tip
To remember 腹, focus on its two main components: 月 (tsuki, the 'flesh' or 'body part' radical, originally 肉) and 復 ('return' or 'repeat'). Picture your belly (月) as the place where food is processed, and things return to their basic components for absorption. Alternatively, after a big meal, your belly expands, then returns to its normal size. The 'return' aspect of 復 can also link to the belly as the 'center' or 'core' where your true feelings and intentions (the metaphorical 'belly') always return. Thus, it's a 'body part' (月) that 'returns' (復) or acts as the 'center' of things – your belly or inner self!