Seems promising, but there's no Japanese monolingual dictionary — avoid this extension if you want to actually learn the language.

Thank you so much, this is exactly what I have been looking for.

a real find for me

Really useful tool for me

Acelera demais o aprendizado do idioma e ajuda a conhecer cada vez mais e mais palavras! Simplesmente incrível!! ❤️

This dictionary is doing all that I could dream of. Instant recognition via mouseover, the dictionary is complete, erudite but also very simple to access if you just want a straightforward translation.
Once you look up the word, you can find the kanji decomposition. It's detailed and easy at the same time. Please try.

I dont remember ever encountering UX breaking bugs on 10ten, nor the previous rikaichamp or the older rikaichan

Does not work at all.

This is very easy to use. The Japanese accent is really useful when I look up the new words and try to speak them.