～済み

The suffix ～済み (zumi) is a cornerstone of Japanese administrative and functional vocabulary, derived from the verb sumu (済む), which fundamentally means to finish, to be settled, or to be completed. When appended to a noun, it transforms that noun into a state of completion, acting much like the English past participle suffixes '-ed' or the standalone word 'completed.' However, its usage is more specialized, often appearing on stamps, digital buttons, and official documents to indicate that a specific process has been finalized. It carries a sense of relief and closure, signifying that a task no longer requires attention because it has been 'settled.'

Morphological Origin

Derived from the continuative form (ren'youkei) of the verb 済む (sumu). Through a process called rendaku (sequential voicing), the 's' in 'sumi' changes to 'z' when it follows certain nouns, resulting in 'zumi'.

Semantic Range

It covers everything from financial transactions (payment) to physical actions (washing) and abstract concepts (agreement). It implies a binary state: either the action is pending, or it is 'zumi'.

Historically, the kanji 済 (sai/sumu) depicted the crossing of a river, which metaphorically evolved into 'getting through' a difficulty or 'completing' a journey. In modern Japanese, this suffix is ubiquitous in the 'Paperless' era, appearing in app notifications and email threads. It is distinct from the word 'owari' (end) because 'zumi' specifically implies that a requirement or obligation has been fulfilled. For example, 'shokuji-zumi' (finished eating) is often used in medical or formal contexts to indicate a patient has already consumed their meal, whereas 'tabe-owaru' is a simple description of the action ending.

Visual Representation

In Japan, you will often see red stamps with characters like '検印済み' (Inspected) or '領収済み' (Received/Paid) on receipts and packages.

Furthermore, 'zumi' can function as a noun or a suffix. When used as 'zumi no [noun]', it acts as an adjective. When used at the end of a sentence like '[Noun] zumi desu', it acts as a predicate. This flexibility makes it an essential tool for concise communication. In the context of the CEFR B1 level, learners should move beyond simple verbs and start using 'zumi' to sound more professional and efficient in daily life and workplace interactions.

To truly master 'zumi', one must understand the nuance of 'settlement'. It is not just that something stopped; it is that the 'debt' or 'requirement' of the action is gone. If you say 'shukudai-zumi', it implies the homework is not just finished, but 'accounted for' or 'ready to be handed in'. This subtle difference is what separates intermediate learners from beginners.

Using ～済み effectively requires understanding its grammatical placement and the phonological rule of rendaku. Primarily, it attaches directly to the stem of a noun (usually a Suru-verb noun) to indicate the completion of that action. It is important to note that while it is written as 済み, it is almost always pronounced as zumi rather than sumi when used as a suffix.

Noun + 済み

The most common pattern. Example: 登録 (Registration) + 済み = 登録済み (Registered). No particle is needed between the noun and the suffix.

Adjectival Use

To describe another noun, use the particle 'no'. Example: 支払い済みのチケット (A paid ticket). This functions like a relative clause but is much more concise.

When constructing sentences, 'zumi' often replaces the more verbose '...shita' (did) or '...shite aru' (is done). For instance, instead of saying 'Yoyaku shite aru seki' (a seat that has been reserved), saying 'Yoyaku-zumi no seki' is more formal and common in written signage. It is particularly prevalent in business Japanese where brevity and clarity are prioritized. However, be careful not to attach it to every noun; it generally works best with nouns that imply a process or a transaction.

Sentence Final Position

When used at the end of a sentence, it is followed by 'desu' or 'da'. It sounds like a status report. 'Check-in zumi desu' (Check-in is complete).

In digital interfaces, you will see 'zumi' used as a label. For example, a button might change from '送信' (Send) to '送信済み' (Sent) after you click it. This provides immediate feedback to the user. In spoken Japanese, it is slightly more formal than saying '...shimashita', but it is very common in polite daily conversation, especially when confirming tasks with others. For example, 'Kore, kensa-zumi?' (Is this inspected?) is a natural way to ask a colleague about a task's status.

Advanced usage involves combining 'zumi' with prefixes like 'mi-' (not yet) to create contrasts, such as 'mi-shiyou' (unused) vs 'shiyou-zumi' (used). This creates a logical system for categorization in inventory management or personal organization. Mastering these patterns allows a learner to navigate Japanese society—from reading labels on trash cans to understanding complex contract terms—with much greater ease.

You will encounter ～済み in almost every facet of Japanese life, from the highly formal to the mundane. It is the language of efficiency. In a professional setting, it is the standard way to mark the status of a project or a document. In a retail environment, it is how staff communicate that a service has been rendered. Understanding where you hear it helps you decode the 'status' of the world around you in Japan.

In the Office

Documents marked with '承認済み' (Approved) or '決裁済み' (Sanctioned). In emails, you'll see '対応済み' (Handled/Responded) to indicate a task is off the to-do list.

In Public Spaces

Signs on seats saying '予約済み' (Reserved). On public toilets or facilities, you might see '清掃済み' (Cleaned) with a timestamp.

One of the most common places to see 'zumi' is on a receipt. When you pay for something at a convenience store or a department store, the clerk might stamp it with '領収済み' (Payment Received). Similarly, if you have a package delivered, the tracking status will change to '配達済み' (Delivered). These are vital pieces of information for daily logistics. In the digital world, apps like LINE or Slack use 'zumi' in their read-receipt systems (though LINE uses 'Kido' for 'Read', the concept of 'zumi' as a status indicator is the underlying logic).

At Home

Families use it to label food in the fridge ('Doku-zumi' - joking about poison, or more commonly 'Shumi-zumi' - finished with a hobby project). It's also used on chore charts.

In the context of healthcare, 'zumi' is life-critical. 'Vaccination completed' is 'Sesshu-zumi'. During the COVID-19 pandemic, 'Sesshu-zumi' certificates were a major part of social discourse. In restaurants, a table that has been cleared and sanitized might have a small card saying 'Shodoku-zumi' (Sanitized). This provides a sense of security and 'Omotenashi' (hospitality) by showing the guest that the necessary steps have been taken for their safety. Even in anime or manga, you might hear a character say 'Keikaku-zumi da' (It's all according to plan/The plan is already set), showing how the term can be used for dramatic effect to imply total control over a situation.

Finally, in legal and real estate contexts, you will see 'Keiyaku-zumi' (Contracted/Sold). Seeing this on a house listing means the property is no longer available. This single suffix saves a lot of explanation, providing an instant update on the legal status of an asset. For a B1 learner, recognizing 'zumi' in these contexts is the difference between trying to buy a house that's already sold and knowing to move on to the next listing.

While ～済み is a powerful tool, it is frequently misused by learners who treat it as a universal 'past tense' marker. It is not a substitute for the '~ta' form of verbs in general narrative. Understanding the boundaries of 'zumi' is key to sounding natural. The most common errors involve phonology, word choice, and grammatical over-extension.

The Pronunciation Trap

Many learners say 'sumi' instead of 'zumi'. While 'sumi' is the dictionary form, the suffixal use almost always triggers rendaku. Saying 'shiharai-sumi' sounds robotic or non-native; 'shiharai-zumi' is the correct flow.

Confusing with '~owari'

'~owari' refers to the end of a duration, while 'zumi' refers to the completion of a requirement. You wouldn't say 'eiga-zumi' (movie-finished) to mean you finished watching a movie; you'd say 'mi-owatta'. 'Zumi' is for tasks.

Another mistake is attaching 'zumi' to pure verbs. You cannot say 'tabe-zumi' (eat-finished) easily; it should be 'shokuji-zumi' (meal-finished). 'Zumi' prefers Sino-Japanese nouns (Kango) or specific Japanese nouns that represent a clear action. If you use it with a casual verb stem, it often sounds awkward or incorrect. Furthermore, learners often forget the particle 'no' when using 'zumi' as an adjective. 'Shiharai-zumi ticket' is wrong; it must be 'Shiharai-zumi NO ticket'.

Over-formality

Using 'zumi' in very casual conversation with friends can sound like you are reading a status report. 'Gohan-zumi?' is okay, but 'Tabeta?' is much more natural for friends.

Lastly, be careful with the kanji. 済み is often confused with 済 (the verb stem) or other similar-looking kanji like 渡 (to cross). In digital typing, ensure you select the correct 'zumi' (済み) and not 'sumi' (墨 - ink) or 'sumi' (角 - corner). While IME usually handles this well, knowing the visual difference is important for reading handwritten notes or old stamps where the 'zumi' might be stylized. Remember: 'zumi' is about 'settling' a matter, so if there's no 'matter' to settle, 'zumi' is likely the wrong choice.

In summary, treat 'zumi' as a status label rather than a verb tense. It describes the *state* of an object or situation after an action has been completed and verified. By focusing on its use with Kango nouns and ensuring the 'no' particle is used correctly in adjectival positions, you will avoid 90% of common learner mistakes.

Japanese has several ways to express 'completion' or 'ending,' and ～済み is just one of them. To use it correctly, you must distinguish it from ~ryou (了), kanryou (完了), shuuryou (終了), and owari (終わり). Each carries a different weight and is used in different social or technical contexts.

～済み vs. 完了 (Kanryou)

'Kanryou' is a formal noun meaning 'completion.' You use it to say 'The project is complete' (Project ga kanryou shita). 'Zumi' is a suffix. You say 'Project-zumi' only if it's a label. 'Kanryou' is more academic/technical.

～済み vs. 終了 (Shuuryou)

'Shuuryou' refers to the end of a period or session (like a class or a game). 'Zumi' refers to the completion of a specific required action. A class 'shuuryou' happens when the clock hits 3 PM; a task is 'zumi' when the work is done.

Then there is the suffix ~ryou (了), which you see on stamps or at the end of books. It is even more concise than 'zumi' and is almost exclusively used in writing. For example, 'shuryou' (終了) vs 'shuryou' (修了 - completing a course). 'Zumi' is much more common in daily spoken Japanese and on practical labels. Another comparison is with ~age (上げ), as in 'deki-age' (finished/ready). 'Age' implies the physical creation is finished, while 'zumi' implies the administrative or necessary process is finished.

～済み vs. 終わり (Owari)

'Owari' is the general word for 'end.' It's used for stories, days, and lives. 'Zumi' is far too functional and specific for these. You wouldn't say 'Jinsei-zumi' (Life-finished) unless you were being very dark or clinical.

In business, you might also see ~ryou (了) as in 'shounin-ryou' (Approved). However, 'shounin-zumi' is more common for the state of the document. The choice often depends on the specific noun it attaches to. For example, 'shiharai' (payment) almost always takes 'zumi', whereas 'keikaku' (plan) might take 'sakusei-zumi' (creation-finished). Understanding these collocations is part of moving to the B2 and C1 levels. For a B1 learner, focusing on 'zumi' for 'shiharai', 'yoyaku', 'kakunin', and 'shiyou' will cover the vast majority of useful situations.

Lastly, compare 'zumi' with 'chu' (中). 'Chu' means 'in progress.' 'Yoyaku-chu' (Currently being reserved) vs 'Yoyaku-zumi' (Already reserved). These two suffixes form the 'status' system of modern Japanese. Mastering the transition from 'chu' to 'zumi' is the essence of tracking any Japanese process.