公布をする

You use 公布をする when talking about official actions by governments or authorities. It's about making something public knowledge in a very formal way. Think of legislative bodies or ministries. They 公布をする new laws after they've been passed. You wouldn't use this for your friend's birthday party announcement, unless maybe the King was invited and decreed it. It’s about official pronouncements that impact society. It’s like the final curtain rising on a new legal drama.

• The government will 公布をする the new tax law next month. (政府は来月、新しい税法を公布する予定です。)
• The emperor 公布をする the constitution. (天皇が憲法を公布する。)
• The revised labor standards were officially 公布をする. (改正された労働基準が正式に公布された。)
• News reports often mention when a new policy is 公布をする. (新しい政策が公布されると、ニュースでよく報じられる。)
• This announcement is equivalent to 公布をする for a new regulation. (この発表は、新しい規制の公布に相当する。)

Use 公布をする when discussing the official, public declaration of laws, decrees, treaties, or significant governmental policies. It’s for when something becomes legally binding or officially recognized by the state. Think of historical moments or major policy changes. It’s the official birth certificate for a new piece of legislation. It’s also used when talking about the promulgation of the constitution or imperial edicts. It’s the ultimate official announcement.

Don't use 公布をする for everyday announcements, personal news, or informal declarations. It’s too formal for announcing a sale at your shop, your new haircut, or your weekend plans. Using it for casual things would sound incredibly stiff and out of place. It's not for sharing gossip or announcing a new product launch unless it's a government-mandated product. It’s definitely not for telling your dog it's time for a walk, unless your dog is a constitutional monarch.

(Using 発表をする (happyō o suru) for a product launch is correct. 公布をする is for official laws/decrees.)

(公布をする is reserved for official, governmental acts, not personal blogs. That would be like announcing your lunch menu via royal decree!)

(Teachers announce, they don't promulgate. Unless the test results are legally binding laws, of course!)

• 発表をする (happyō o suru): To announce, present, or make public. More general than 公布をする. Can be used for anything from a business report to a concert announcement.
• 告知をする (kokuchi o suru): To inform, notify, or announce. Often used for public notices, warnings, or upcoming events. It's less formal than 公布をする but more formal than a casual announcement.
• 宣言をする (sengen o suru): To declare or proclaim. Often used for strong statements, declarations of independence, or personal vows. It carries a sense of strong assertion.
• 告示をする (kokuji o suru): To give public notice. Similar to 告知をする but often specifically for official public notices required by law, like zoning changes or public hearings.

• 公布 (kōfu): The noun form, meaning 'promulgation' or 'announcement'. Example: 「新法の公布」 (shinpō no kōfu) - promulgation of the new law.
• 公布日 (kōfu-bi): The date of promulgation. Example: 「公布日は来週です」 (kōfu-bi wa raishū desu) - The promulgation date is next week.
• 公布する (kōfu suru): The verb form without をする. Often used in more concise, written contexts like news headlines or legal documents. Example: 「法律が公布される」 (hōritsu ga kōfu sareru) - The law is promulgated.

• What's the difference between 公布をする and 発表をする? 公布をする is strictly for official, legal pronouncements like laws. 発表をする is a general announcement for anything, like a product or event. Think 'royal decree' vs. 'Twitter announcement'.
• Can I use 公布をする for personal news? Absolutely not! It's way too formal. It’s like using a formal treaty document to invite someone for pizza. Stick to 連絡をする (renraku o suru) or 伝える (tsutaeru) for personal stuff.
• Is 公布をする always about laws? Mostly, yes. It’s primarily for legislation, constitutions, imperial edicts, or major government decrees. It signifies the official start of something legally binding. It's the ultimate 'it's official' for governmental actions.