Meaning
The phrase “腹を括る” (Tie up your stomach) means to brace yourself or to make up your mind to face a difficult or unavoidable situation with determination or resolve.
It’s similar to “to steel oneself,” “to bite the bullet,” or “to accept one’s fate.”
This idiom is not just “decide.” It implies:
- the situation is serious (pressure, risk, fear, or responsibility)
- you accept it as it is
- you commit
When to use (typical situations):
- giving a presentation, taking an exam, speaking in public
- confessing something / having a difficult talk
- making a risky decision (quitting a job, moving, surgery)
- dealing with consequences you can’t avoid
- taking responsibility as a leader/parent/manager
Example sentence
プレゼンは不安だけど、腹をくくってやるしかない。
I’m nervous about the presentation, but I’ve made up my mind to go for it.
- もう逃げられない。腹をくくって、正直に話そう。
I can’t run anymore. I’ll brace myself and speak honestly. - 手術の説明を聞いて、腹をくくった。
After hearing the surgery explanation, I braced myself. - 彼は批判を覚悟で、腹をくくって改革を進めた。
He pushed the reforms forward, prepared for criticism.
Similar Expressions
Japanese has a few expressions that look similar but feel very different in real use: 腹を括る (hara o kukuru), 腹を決める (hara o kimeru), and 高を括る (taka o kukuru).
腹を括る vs 腹を決める: Decision vs consequences
First, 腹を括る and 腹を決める both describe “making up your mind,” especially in situations where you feel pressure, fear, or responsibility. The difference is where the emphasis falls. 腹を決める is primarily about choosing a direction and committing to it. You have been hesitating, weighing options, or wanting to avoid the decision, and then you finally settle it: “I’m doing this.” It often carries the sense that you’ve concluded there isn’t a better alternative, or that this is the only realistic path.
By contrast, 腹を括る is more about preparing yourself for what may happen after you act. It is not only “deciding,” but “deciding while accepting the consequences.” The situation is serious, and you may expect criticism, failure, pain, or loss—yet you resolve not to flinch. In English, that is why it often matches phrases like “brace yourself,” “steel yourself,” or “bite the bullet.” When someone says 腹を括って言う, the nuance is not simply “I decided to say it,” but “I’m ready to take the backlash, and I’ll say it anyway.”
高を括る: underestimate, look down on something
“高を括る” uses the same verb 括る, but it does not mean “be determined.” 高を括る means to assume something is “only about that level,” to take it lightly, or to underestimate it.
The nuance is usually negative: you misjudge the difficulty or the opponent, and your overconfidence leads to trouble.
That is why it maps to English expressions like “underestimate,” “think it’s no big deal,” or “make light of it.”
- 今回のテストは簡単だと高を括っていたら、全然できなかった。
I thought this test would be easy, but I completely failed it. - 会議資料の作成は一時間で終わると高を括っていたが、徹夜することになってしまった。
I had assumed preparing the meeting materials would take only an hour, but ended up pulling an all-nighter.
In other words, 腹を括る is about serious resolve and readiness, often admirable. 腹を決める is about settling on a course of action and committing to it. 高を括る is about underestimating something—almost the opposite attitude of the first two.
