Hi !
I noticed that a lot of websites providing Japanese lessons are either very poor at quality either not ergonomic nor easy to use.
That is why I decided to create my own platform for people willing to study Japanese and to prepare for the JLPT exam.
The name of the platform is JLPTMatome : https://jlptmatome.com
Basically, there are grammar, vocabulary and kanji lessons and soon there would be also online test, jlpt exam simulations, real conversation podcasts and a blog for sharing words and expressions that only people living in Japan could learn and that would not be available in any book.
The goal is also to build a little community of Japanese learners, so if you need any functionality or additional materials please feel free to contact me !
Louis