✨ Basic Meaning
🎯 Primary Function
📋 Grammar Structure
🎭 Usage Contexts
Commonly used in formal contexts like business emails, instructions, or official announcements.
Used in everyday conversations when setting informal deadlines for tasks or meetings.
Frequently used in written instructions, schedules, and notifications.
Often used in spoken instructions and arrangements.
💡 Common Applications
📌 Important Points
⚠️ Common Mistakes
🏛️ Cultural Context
🔍 Subtle Differences
📝 Conjugation Notes
– For nouns indicating time or events: Attach directly (e.g., 月曜日までに, 試験までに). – For verbs: Attach to the plain form (e.g., 終わるまでに, 終わったまでに, 終わらないまでに). The tense of the verb before までに sets the *condition* for the deadline (by the time [condition] is met/not met), not the tense of the action completed by the deadline itself. The main verb of the sentence dictates the time of completion.
🔊 Pronunciation Tips
Pronounced “ma-de-ni”. The “ni” particle is pronounced clearly.
🧠 Memory Tips
Think of 「までに」 as “By this point, it must be done!”. Associate 「に」 with a specific point (like the “ni” particle often marking a specific time).

I’m a software engineer based in Japan, with experience in developing web and mobile applications. I’m passionate about technology, especially in DevOps, AI, and app development using platforms like AWS, Flutter, and Node.js. My goal is to build a website that shares knowledge about the Japanese language and IT, helping everyone learn and grow more easily in the digital era.