Japanese verb conjugation is quite simple, because most verbs are regular.
The regular verbs are divided in Ichidan and Godan verbs.
Ichidan verbs end in -eru and -iru. The Godan verbs end in a consonant or vowel and -u.
There are two irregular verbs:
Suru is one of the most used verbs in Japanese, because it is used to form compound verbs, such as benkyousuru （勉強する）’to study’ and dansusuru （ダンスする）’to dance’. From the latter example you can see that suru is used to make new verbs from loan words, too.
While the verb conjugation itself is easy, the use of the verbs is not. But that’s another story.