Japanese Bonjinsha

A book store specializing in Japanese language
http://www.bonjinsha.com/　　(Japanese）

Japanese Language Proficiency Test

A site with information posted about the JLPT
http://info.jees-jlpt.jp/

AJALT　(Association for Japanese Language Teaching)

Learn Japanese online
http://www.ajalt.org/english/

Tokyo University of Foreign Studies Language Modules

Videos appear on your screen to help you understand Japanese. While lines of Japanese are spoken, text appears beneath.
http://www.coelang.tufs.ac.jp/modules/ja/index.html

NHK World

Easy Japanese
https://www.nhk.or.jp/lesson/

Japan Foundation

Erin’s Challenge
https://www.erin.ne.jp/en/index.php

Marugoto e-Learning
https://www.marugoto.org/en/e-learning/