Japanese Grammar

The 3 Japanese Verb Groups

Every Japanese verb belongs to one of three groups. Categorizing them correctly is the master key to unlocking all verb conjugations.

Why Verb Groups Matter

In Japanese, verbs change their endings (conjugate) depending on what you want to sayโ€”like making it polite, past tense, or negative. However, the rule for changing the ending depends entirely on which 'Group' the verb belongs to.

If you misidentify a verb's group, you will conjugate it incorrectly. For example, if you treat the Group 1 verb 'kaeru' (to return) as a Group 2 verb, you will say it wrong.

The good news? There are only three groups, and the rules to identify them are very straightforward.

How to Identify Verb Groups

Group 1 (U-Verbs / Godan)
Ends in ~u (ใ†)
โ†’่ฒทใ† (kau - to buy)
Always Group 1
Ends in ~ku (ใ) / ~gu (ใ)
โ†’ๆ›ธใ (kaku - to write)
Always Group 1
Ends in ~su (ใ™) / ~tsu (ใค)
โ†’่ฉฑใ™ (hanasu - to speak)
Always Group 1
Ends in ~nu (ใฌ) / ~bu (ใถ) / ~mu (ใ‚€)
โ†’้ฃฒใ‚€ (nomu - to drink)
Always Group 1
Ends in ~a/u/o + ru (ใ‚‹)
โ†’ไน—ใ‚‹ (noru - to ride)
If the vowel before 'ru' is a, u, or o, it's Group 1
Group 2 (Ru-Verbs / Ichidan)
Ends in ~i + ru (ใ„ใ‚‹)
โ†’่ฆ‹ใ‚‹ (mi-ru - to see)
Usually Group 2
Ends in ~e + ru (ใˆใ‚‹)
โ†’้ฃŸในใ‚‹ (tabe-ru - to eat)
Usually Group 2
Group 3 (Irregular)
ใ™ใ‚‹ (suru)
โ†’-
To do (Only 2 irregular verbs exist!)
ใใ‚‹ (kuru)
โ†’-
To come

Group 1 Exceptions (The 'Fake' Group 2s)

ๅธฐใ‚‹
kaeru (to return)
Looks like Group 2 (~eru), but is actually Group 1.
ๅ…ฅใ‚‹
hairu (to enter)
Looks like Group 2 (~iru), but is actually Group 1.
็Ÿฅใ‚‹
shiru (to know)
Looks like Group 2 (~iru), but is actually Group 1.
ๅˆ‡ใ‚‹
kiru (to cut)
Group 1 โ€” compare ็€ใ‚‹ (kiru, to wear), which IS Group 2. Same sound, different group!
่ตฐใ‚‹
hashiru (to run)
Looks like Group 2 (~iru), but is actually Group 1. A JLPT favorite.
่ฆใ‚‹
iru (to need)
Group 1 โ€” compare ใ„ใ‚‹ (iru, to exist), which is Group 2. Context tells them apart.

Teacher's Advice

General Advice

Don't try to memorize all the exceptions at once. Focus on the core rules. When you encounter an exception like 'kaeru' (to return), just make a mental note: 'Ah, this is a tricky Group 1 verb!' Over time, your brain will naturally categorize them.

The Fastest Verification Trick

Not sure if a ~ru verb is Group 1 or 2? Try the negative. Group 2 drops ใ‚‹ and adds ใชใ„ (้ฃŸในใ‚‹ โ†’ ้ฃŸในใชใ„). Group 1 changes ใ‚‹ to ใ‚‰ใชใ„ (ๅธฐใ‚‹ โ†’ ๅธฐใ‚‰ใชใ„). If you have ever heard the verb used in the negative โ€” from anime, songs, or conversation โ€” your ear already knows the answer. ๅธฐใ‚‰ใชใ„ sounds right; ๅธฐใชใ„ does not exist.

Why This Page Matters for Everything Else

Every conjugation you will ever learn โ€” te-form, potential form, negative, volitional โ€” branches on the verb group first. Students who skip this step keep making the same mistakes in every new grammar point. Master group identification now and every later chapter becomes twice as fast.

How this is tested in JLPT N5

  • โ€ขConjugation questions will test if you know a verb is Group 1 or 2.
  • โ€ขExceptions like ๅธฐใ‚‹ (kaeru), ๅˆ‡ใ‚‹ (kiru), and ่ตฐใ‚‹ (hashiru) are frequently tested to trick you.
  • โ€ขYou must know these groups perfectly to answer listening questions quickly.
  • โ€ขSame-sound pairs ๅˆ‡ใ‚‹/็€ใ‚‹ and ่ฆใ‚‹/ใ„ใ‚‹ appear in kanji-reading and context questions (N5)
  • โ€ขGroup 3 (ใ™ใ‚‹ใƒปใใ‚‹) compounds like ๅ‹‰ๅผทใ™ใ‚‹ conjugate as suru โ€” tested in every N5 grammar section

Related Grammar

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Japanese Verb Groups (Group 1, 2, 3) Guide | Nihongo Pass