It is very important to be familiar with the classification of Japanese verbs when you compose your first Japanese sentences. In addition, when you are learning about advanced grammar structures you will need a decent knowledge on Japanese verbs. In the future similarly to grammar books I will refer to the group number which the given verb belongs to when I explain specific grammatical rules. Linguists and Japanese teachers classify the verbs into three big groups. As always exceptions exist. The good news is that the third group is created for the exceptions, but in the same time the bad news is that the first and the second group overlap, which means you will have to learn these verbs one by one. Before diving into the classifications, you will need to master the Katakana and Hiragana alphabets. This is not only important because I will use these characters to write down Japanese words, but many of the grammatical rules are based on the vowel system of the language. If you are still not familiar with these alphabets, you can practice them on my site for free.
Japanese verbs can be classified into three big groups
These two alphabets are used for writing down syllables. These syllables are made of five vowels: a, i, u, e, o. The Katakana and Hiragana alphabets are basically created by putting consonants before these vowels. As such if we use "k" for example:
You need the master the hiragana and the katakana alphabets before learning Japanese verbs
All right, after this short introduction, let's see the groups. I have already talked about conjugation of the Japanese adjectives in one of my previous articles. I have already mentioned that the Japanese words basically have two forms. One is called the "dictionary form(辞書形)" which you can find if you look up a word in a dictionary and the other one is called the "conjugated form" which is created by changing the ending of a specific word. If you are looking for a Japanese verb in a dictionary you will find it in a form that ends in a "u" sound.
る、ゆ、む、ふ、ぬ、つ、す、く、う 「I am not sure if there is an example for all the letters...」As I have already mentioned the Japanese verbs can be classified into three big groups. Among them the easiest to remember is the third group since it only has two members.
Exceptional verbs belong to group 1, even though they look like group 2 verbs
Let's see some example for clarification