✨ Basic Meaning
🎯 Primary Function
📋 Grammar Structure
🎭 Usage Contexts
Used appropriately in both formal and informal contexts depending on the specific meaning and attached politeness levels (e.g., 合います vs. 合う). The compound verb forms are common in both.
Very frequently used in informal conversation for all its meanings.
Common in written language, including literature, news, and academic texts.
Extremely common in everyday spoken Japanese.
💡 Common Applications
📌 Important Points
⚠️ Common Mistakes
🏛️ Cultural Context
🔍 Subtle Differences
📝 Conjugation Notes
合う (あう) is a regular Godan verb (う-verb). Its ます stem is 会い (あい). Conjugates like 買う (かう). Example: 会います (aimasu), 会わない (awanai), 会った (atta), 会えば (aeba). The compound verb forms (e.g., 話し合う) conjugate based on the final 合う.
🔊 Pronunciation Tips
Pronounced あ・う (a-u). Pay attention to the double vowel sound when pronounced slowly, though it often sounds closer to a single elongated “a” in rapid speech.
🧠 Memory Tips
Think of the kanji 会 (かい), which relates to meeting or coming together. This can help you remember the core idea of convergence, which underlies most meanings: people meeting, things coming together and fitting, opinions coming together and agreeing, people doing an action together.

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.