What is the proper word for self-study?


So I know that jiko shoukai is self-introduction. And benkyou is study. So I
took a guess and figured that self-study is jiko benkyou. The context of this
is if someone asks "how did/do you study Japanese?" And the reply is "I
studied by myself." or just "Self-study.". So just to make sure I took a quick
look at Google Translate and it gave me these options:

  * jishuu 
  * dokugaku 
  * dokushuu

But didn't give jiko benkyou. So what would be the proper word to use for this
response?




To "How did/do you study Japanese?" you'd respond

> [独学]{どくがく}です。  
>

(not [自習]{じしゅう}です, [自己勉強]{じこべんきょう}しました or [独習]{どくしゅう}です.)  

I think the word [自習]{じしゅう}(する) refers to "(to) seatwork" or "study hall".




To "How did/do you study Japanese?" you'd respond

> [独学]{どくがく}です。  
>

(not [自習]{じしゅう}です, [自己勉強]{じこべんきょう}しました or [独習]{どくしゅう}です.)  

I think the word [自習]{じしゅう}(する) refers to "(to) seatwork" or "study hall".

