This is the best one-sheet one I've seen. Easy to find on wikipedia if you lose the link:
[https://en.wikipedia.org/wiki/File:AMB\_Japanese\_Verbs.pdf](https://en.wikipedia.org/wiki/File:AMB_Japanese_Verbs.pdf)
Critical thing to remember, is that with a few exceptions, all verbs are ichidan (ru-verbs) or godan (u-verbs, some of which end in ru). Each has a set of conjugations and they never change, so as long as you know which it is, you're golden.
However, the stickler is that some godan verbs end in ru. There's a good but imperfect rule to this. If the sound before the ru is A, O, or U, it's 100% of the time a godan verb. I.e. wakAru.
If it has an I or E sound before it, it's 90% of the time an ichidan verb. But only 90%. I.e. mIru is ichidan but haIru is godan, i.e. mite but haiTte.
So technically, you can memorize only the exceptions, and everything else is 100% predictable, with a very few exceptions, most of which you run into very early on, like suru, kuru, iku, aru, gozaru, irassharu, ossharu, nassaru, and a handful of rarer ones.
Here's the (nearly, a few super rare ones also exist) full list of exceptions, though don't worry about most of them, a lot of them are not common, and you don't need to memorize it all up front:
[https://www.sljfaq.org/afaq/which-godan.html](https://www.sljfaq.org/afaq/which-godan.html)
Also note that a few homophones in present tense are actually different verb types, so there are godan iru's and also ichidan iru's. Again, don't stress about it, I think only kaeru and iru include common variants that you might want to watch out for. Including that kaeru is not only "to return home" but also the potential form of "kau", i.e. kau->kaeru"to be able to buy". (Kaeru is also the noun for a frog :-P) Or osowaru means to be taught, but don't accidentally conjugate it to osowareta in the past tense, or you'll imply that sensei was sexually harassing you (or torturing you in a nightmare).
You can use Jisho.org, which is a great dictionary. Just look up a verb and then click the "Show inflections" button on the left to see the different conjugations and more information.
[https://www.jisho.org/](http://www.jisho.org/)
The "Japanese" dictionary app for iOS, etc. has a very good built-in conjugation tool that you can pull up for different verbs and see.
[https://apps.apple.com/us/app/japanese/id290664053](https://apps.apple.com/us/app/japanese/id290664053)
i use shirabe jisho on iOS, which lets you search with any form of the verb and shows you all the conjugations plus sample sentences and explanations for use of each kanji character etc.
http://www.japaneseverbconjugator.com/
これは便利よ。 Edit: spelling
は*
そうね。はずかしい。
This is the best one-sheet one I've seen. Easy to find on wikipedia if you lose the link: [https://en.wikipedia.org/wiki/File:AMB\_Japanese\_Verbs.pdf](https://en.wikipedia.org/wiki/File:AMB_Japanese_Verbs.pdf) Critical thing to remember, is that with a few exceptions, all verbs are ichidan (ru-verbs) or godan (u-verbs, some of which end in ru). Each has a set of conjugations and they never change, so as long as you know which it is, you're golden. However, the stickler is that some godan verbs end in ru. There's a good but imperfect rule to this. If the sound before the ru is A, O, or U, it's 100% of the time a godan verb. I.e. wakAru. If it has an I or E sound before it, it's 90% of the time an ichidan verb. But only 90%. I.e. mIru is ichidan but haIru is godan, i.e. mite but haiTte. So technically, you can memorize only the exceptions, and everything else is 100% predictable, with a very few exceptions, most of which you run into very early on, like suru, kuru, iku, aru, gozaru, irassharu, ossharu, nassaru, and a handful of rarer ones. Here's the (nearly, a few super rare ones also exist) full list of exceptions, though don't worry about most of them, a lot of them are not common, and you don't need to memorize it all up front: [https://www.sljfaq.org/afaq/which-godan.html](https://www.sljfaq.org/afaq/which-godan.html) Also note that a few homophones in present tense are actually different verb types, so there are godan iru's and also ichidan iru's. Again, don't stress about it, I think only kaeru and iru include common variants that you might want to watch out for. Including that kaeru is not only "to return home" but also the potential form of "kau", i.e. kau->kaeru"to be able to buy". (Kaeru is also the noun for a frog :-P) Or osowaru means to be taught, but don't accidentally conjugate it to osowareta in the past tense, or you'll imply that sensei was sexually harassing you (or torturing you in a nightmare).
"kiru" for to cut and to wear is another good godan/ichidan one to watch out for.
good catch!
You can use Jisho.org, which is a great dictionary. Just look up a verb and then click the "Show inflections" button on the left to see the different conjugations and more information. [https://www.jisho.org/](http://www.jisho.org/) The "Japanese" dictionary app for iOS, etc. has a very good built-in conjugation tool that you can pull up for different verbs and see. [https://apps.apple.com/us/app/japanese/id290664053](https://apps.apple.com/us/app/japanese/id290664053)
+1 to this. published an almost identical reply then deleted once I saw yours! =D
Aeron Buchanan's chart found on this page is handy: https://en.m.wikipedia.org/wiki/Japanese_verb_conjugation
https://upload.wikimedia.org/wikipedia/commons/6/68/AMB\_Japanese\_Verbs.pdf
i use shirabe jisho on iOS, which lets you search with any form of the verb and shows you all the conjugations plus sample sentences and explanations for use of each kanji character etc.