Click on the orange button “ニコニコ会員登録” in the top center of the page.
 
 
Click the button “一般会員” to create a free account.
Enter an PC email address and click “次へ進む” to proceed.
Open the email from nicovideo.jp and click URL in the message.Fill out all the fields; nickname, gender, birthday, country, area and password. Then, click “次の画面に進む” to proceed. 
 Go through each field for double-check. Th