逃がす

The Japanese verb 逃がす (nigasu) is a transitive verb that primarily means 'to let escape,' 'to set free,' or 'to allow to get away.' Unlike its intransitive counterpart 逃げる (nigeru), which describes the act of escaping itself, 逃がす focuses on the person or agent who permits, accidentally or intentionally, the escape to happen. This distinction is crucial for English speakers who might use 'escape' for both the actor and the permitter. In Japanese, the causative-like ending -gasu signals that an external force is involved in the outcome. This word is a staple in everyday conversations, literature, and news reporting, spanning contexts from the mundane act of letting a mosquito out of a window to the high-stakes scenario of a police officer failing to apprehend a suspect.

Intentional Release

When someone consciously decides to set a living creature free. For example, a child releasing a beetle back into the woods or a catch-and-release fisherman returning a trout to the stream.

Accidental Loss

When someone tries to catch or hold onto something but fails. This is common in sports (letting a ball slip) or when a pet runs out of an open door because of negligence.

One of the most fascinating aspects of nigasu is its psychological weight. In Japanese culture, the act of 'letting go' can carry nuances of mercy (jihi) or deep regret (koukai). When you use this word, you are acknowledging your role as the catalyst for the change in state—from 'captured' to 'free.' It is not just that the object escaped; it is that you were the one who let it happen. This makes it a very active verb, even when the result is a passive loss. You will find it used frequently in idioms like 'nigashita sakana wa ookii' (the fish that got away was big), which mirrors the English 'the one that got away' sentiment, emphasizing how we tend to overestimate the value of things we fail to keep.

Beyond physical creatures, nigasu can occasionally be used for opportunities, though the related verb 逃す (nogasu) is more common for abstract concepts. However, in casual speech, the two are sometimes blurred. If you are talking about a physical entity—a person, an animal, a bug—nigasu is almost always the correct choice. It evokes a sense of movement and spatial transition. In historical dramas (jidaigeki), you might hear a samurai say he will 'let someone go' this time (konkai wa nogashite yaru), showing a position of power and choice. This power dynamic is inherent to the word; to let something escape, you must first have had some form of control or proximity to it.

Social Nuance

Using nigasu implies responsibility. If you say 'I let the opportunity escape' using nigasu, it sounds more like you had it in your hands and it physically slipped out, whereas nogasu sounds like you missed the timing.

Using 逃がす (nigasu) correctly requires an understanding of its grammatical structure as a Godan verb. Because it is transitive, the basic pattern is [Subject] が [Object] を 逃がす. The object is typically a living thing or something that can move of its own volition. Let's break down the different ways this verb can be conjugated and applied in various sentence structures to express different nuances of 'letting go' or 'failing to catch.'

The Potential Form: 逃がせる

Used to indicate the ability to let something escape. Often used in negative contexts, like 'I couldn't let it go.' Example: Kago no tori wo nigasete yatta (I was able to let the caged bird go).

The Te-form + Shimau: 逃がしてしまう

This is perhaps the most common way to hear nigasu in daily life. It expresses regret or an accidental occurrence. 'I accidentally let it escape.' Example: Gokiburi wo nigashite shimatta! (I accidentally let the cockroach get away!).

When you want to emphasize that letting something go was an act of kindness or a favor, you combine nigasu with auxiliary verbs like -te ageru, -te yaru, or -te kureru. Nigashite ageru suggests a polite or kind release, while nigashite yaru is more forceful or used towards animals or social inferiors. For instance, a hero in a story might say to a defeated enemy, 'Omae wo nigashite yaru' (I'll let you go/spare you), which asserts the hero's dominance and mercy simultaneously.

In more complex sentences, nigasu can be part of a conditional clause. 'If you let him escape now, we'll never catch him' would be Ima kare wo nigashitara, nido to tsukamaerarenai. Notice how the focus remains on the action of 'letting' rather than the 'escaping' itself. This verb is also used in the negative imperative nigasu na! (Don't let it get away!), a common shout in action sequences or when a pet is about to bolt through an open gate.

Causative Nuance

Though nigasu is its own verb, it functions similarly to the causative form of nigeru (which would be nigessaseru). However, nigasu is the natural, lexicalized way to express 'let escape' in standard Japanese.

The word 逃がす (nigasu) echoes through various strata of Japanese society, from the high-tension environment of a police procedural to the quiet regret of a failed fishing trip. Understanding where you'll encounter this word helps in grasping its emotional and situational weight. It is not just a vocabulary item; it is a narrative tool used to describe the pivotal moment when something slips through one's fingers.

In Crime Dramas and News

This is perhaps the most frequent context. News anchors might report that the police 'let a suspect escape' (yougisha wo nigashita) due to a blunder. In dramas, the detective might lament, 'I let him get away right before my eyes' (me no mae de nigashite shimatta).

In Nature and Hobbies

Fishing is the classic hobby associated with nigasu. Whether it's catch-and-release (nigashite ageru) or the frustration of a fish snapping the line (nigashita), the word is central to the experience. Similarly, insect collecting (mushi-tori) often involves children catching and then 'letting go' their finds.

In the world of sports, particularly baseball or soccer, nigasu is used when a team fails to take advantage of a 'chance' (chansu). While nogasu is technically more accurate for abstract chances, nigasu is frequently heard in the heat of the moment, personifying the 'chance' as something that was physically there to be caught. A commentator might yell, 'Kono kouki wo nigasu no ka!' (Is he going to let this golden opportunity escape?!).

In everyday household life, nigasu is used for the minor annoyances of life. Letting a fly into the house, or conversely, trying to usher a bee out of the window without killing it. In these cases, nigasu carries a sense of spatial management—moving something from an 'inside' or 'captured' space to an 'outside' or 'free' space. It is also used in the context of letting heat or air escape, such as leaving a window open to 'let the heat out' (netsu wo nigasu), though this is a more specialized usage.

Video Game Context

In games like Pokémon, when a monster escapes from a ball, the game might say it 'escaped' (nigeta), but if you choose to release a Pokémon from your storage, you are 'letting it go' (nigasu).

The verb 逃がす (nigasu) is often a source of confusion for Japanese learners because of its proximity to several other similar-sounding or similar-meaning verbs. The most common errors involve confusing transitivity, nuances of 'opportunity' versus 'physical escape,' and incorrect particle usage. Let's examine these pitfalls in detail to ensure your Japanese remains natural and precise.

Confusing 逃がす (nigasu) with 逃げる (nigeru)

This is the most frequent mistake. Nigeru is intransitive (the subject escapes), while nigasu is transitive (the subject lets someone else escape).
Wrong: Dorobou ga nigashita. (The thief let [someone] escape - usually meant 'The thief escaped').
Right: Dorobou ga nigeta. (The thief escaped).

Nigasu vs. Nogasu (逃がす vs 逃す)

While they share the same kanji 逃, they are used differently. Nigasu is primarily for living things (fish, people, bugs). Nogasu is for abstract things like chances, opportunities, or timing. While nigasu is sometimes used for chances in casual speech, nogasu is the standard. Using nogasu for a pet bird would sound very strange.

Another mistake is the incorrect use of particles. Because nigasu is transitive, it requires the object marker を (wo). Learners often mistakenly use が (ga) because they are thinking of the object as the 'actor' who is doing the escaping. Remember: in the sentence 'I let the bird escape,' the bird is the object of your 'letting,' so it must be tori wo nigasu.

Learners also struggle with the nuance of nigashite shimau versus nigasu. If you say sakana wo nigashita, it could mean you intentionally let it go. If you want to convey that it was a mistake or an accident, you must use the -te shimau form: sakana wo nigashite shimatta. Without this, the listener might be confused about whether you are a kind fisherman or just a clumsy one.

Overusing 'Let' in English

In English, 'let escape' can be very passive. In Japanese, nigasu feels more like an action. If someone escapes because you weren't looking, nigasu is appropriate. But if they escaped because they were too fast, you might say nigerareta (I was escaped from) to emphasize your lack of control.

To truly master 逃がす (nigasu), it's helpful to compare it with its synonyms and related terms. Japanese has several ways to express the idea of 'releasing' or 'losing' something, each with its own specific context and level of formality. Choosing the right one will make your Japanese sound much more sophisticated and natural.

逃す (nogasu)

Comparison: While nigasu is for living things, nogasu is for opportunities (chansu), luck (kouun), or a specific moment in time. You nigasu a fly, but you nogasu a promotion.

放す (hanasu)

Comparison: Hanasu means 'to release' or 'to let go of one's grip.' Use this when you are physically holding something and you open your hand. Nigasu implies the object moves away from your control entirely, while hanasu just describes the act of letting go.

解放する (kaihou suru)

Comparison: This is a more formal, academic, or political term meaning 'to liberate' or 'to set free.' You would use this for prisoners of war, oppressed people, or even 'releasing' stress in a psychological context. It is much heavier than nigasu.

Another interesting alternative is 放免する (houmen suru), which is specifically used in legal or historical contexts for 'acquitting' or 'releasing' someone from custody. You might hear this in a samurai movie when a lord decides not to punish a criminal. In contrast, 見逃す (minogasu) means 'to overlook' or 'to turn a blind eye.' If you see someone doing something wrong but decide to 'let them go' without reporting them, minogasu is the perfect verb.

Finally, consider 逃げられる (nigeraretu), the passive form of nigeru. While nigasu focuses on your failure or choice, nigerareta focuses on the fact that the escape happened to you, often implying you are the victim of the escape. For example, if a girlfriend leaves a boyfriend, he might say kanojo ni nigerareta (My girlfriend left/escaped from me), which carries a much stronger sense of personal loss than nigashita.

Summary Table

• 逃がす: Physical entities (intentional or accidental).
• 逃す: Abstract opportunities or timing.
• 放す: Physical release of grip.
• 解放する: Formal liberation.
• 見逃す: Overlooking or showing mercy by not acting.