公表をする

Grammatically, this is a 'suru' verb with the object marker を to give it extra weight. You will mostly see it paired with nouns that represent objective information. Common partners include 結果 (results), 調査 (survey), 方針 (policy), or 実名 (real names). You use the pattern: [Information] + を + 公表する (or 公表をする). In professional writing, the を is sometimes dropped for brevity (公表する), but adding it back in emphasizes the action itself. It’s like saying 'performing the act of publicizing' versus just 'publicizing.' If you want to sound like a serious news anchor or a CEO on a Zoom call, this is your go-to structure. Just don't use it for your lunch menu unless you're a very famous chef.

You’ll hear this constantly on NHK news or read it in the Nikkei newspaper. When the Japanese government releases the latest COVID-19 statistics or census data, they are doing 公表. In the world of tech, if Apple or Google releases a report on how many government requests for data they received, they use 公表をする. On a more modern note, if a famous YouTuber decides to finally reveal their face or their real name after years of anonymity, a news site might report that they 実名を公表した. Even in the gaming world, when a company like Nintendo finally releases the official sales numbers for the Switch, that’s a 公表. It’s the language of the 'Big Reveal' but with a suit and tie on.

Use this when the information is 'official' and 'important.' If you are working in a Japanese office and your team finishes a project that needs to be shared with the whole company, 公表をする is appropriate. It’s perfect for statistical data, scientific discoveries, or government policies. It’s also the right choice when talking about transparency. If someone is accusing a company of hiding something, they might demand that the company 事実を公表しろ (Make the facts public!). It’s a word that demands truth. It’s also used when a celebrity officially announces a marriage or a divorce to the media—though 発表 is more common there, 公表 adds a layer of 'this is an official fact we are now acknowledging.'

Avoid this for gossip or small, personal secrets. If you’re telling your best friend that you have a crush on someone, saying 公表をする would make you sound like a robot or a very weird politician. 'I am now making public my love for Tanaka-kun' is a great way to ensure you never get a date. Also, don't use it for creative works. You 発表 (announce/present) a new song or 公開 (open to public) a new movie. You don't 公表 a movie unless you're talking about its budget or a scandal involving the lead actor. It’s for facts, not art. Using it for your daily Instagram story about your cat would be hilarious but technically 'over-kill.'

A very common trap is mixing this up with 発表する (happyou suru). While 発表 is a general 'announcement' (like a student giving a presentation), 公表 is strictly for making something 'publicly known.'

Another mistake is using it for things that are 'opened' like a park or a website. For those, use 公開 (koukai). You 公開 a website, but you 公表 the number of users that website has. It’s a subtle difference that makes you sound like a pro if you get it right.

発表する (happyou suru) is the friendly cousin. It’s used for everything from school projects to new product launches. 公開する (koukai suru) is used for 'opening' things to the public, like a museum, a file, or a video on YouTube. 公示する (kouji suru) is even more formal, used almost exclusively for legal notices or election dates. 開示する (kaiji suru) is often used in legal or financial contexts, like 'disclosing' documents in a court case. If 発表 is a shout, 公表 is a formal declaration, and 公開 is opening a curtain. Choose your tool based on how much 'official' weight you want to carry.

You might hear 公表を控える (kouhyou o hikaeru), which means to 'refrain from making public.' This is what companies do when they are trying to hide a scandal. 事後公表 (jigo kouhyou) refers to making information public after the fact. 一斉公表 (issei kouhyou) is when everyone releases information at the exact same time, like a coordinated news drop. You’ll also see 未公表 (mikouhyou) for things that are 'not yet made public.' If you’re a fan of spy movies, keep an eye out for 非公表 (hikouhyou), which means 'undisclosed' or 'classified.' It’s the 'Secret' stamp of the corporate world.

Is 公表 too formal for daily life? Mostly, yes. You won't use it when talking about your weekend plans. However, you'll see it every time you open a news app. Is it used for bad news only? Not at all! It’s used for any official data, like positive economic growth. Can I use it on social media? Sure, but only if you're being 'mock-serious.' If you announce your engagement like a government press release, it’s a funny bit. Otherwise, stick to 発表. Does it always involve the government? No, but it always involves an 'official' entity, like a company, school board, or organization.