[gabelschlager]

There are sites like japanese.io, that allow you to copy/paste any text and get vocabulary lookup, furigana support, allow to add words to a flashcard deck and other things.

I really like their idea and feel such a platform would add a lot of benefit, since you can read whatever you care about. Sadly, the site struggles with longer texts (the UI is not optimized for it) and their flashcard system isn't that great. I have been toying with a similar idea myself. I'd love to read my ebooks with an easy way to look up vocabulary and easily creating flashcard decks containing all unknown words. However, getting the morphological analysis correct while providing fast dictionary lookup has been quite the challenge. This is the first larger project I've attempted so far, so lack of experience definitely is an issue in that regard.

So if anyone has some ideas, feel free to share them. It's not something I pursue commercially, so lack of market doesn't bother me.

[chrisvasselli]

You should check out my other app, Nihongo (https://nihongo-app.com), it has functionality like this, and is one of the reasons I developed it in the first place.

I take DRM free ebooks and copy them into the app one chapter at a time. It automatically creates flashcards for all the words that appeared that I don't already know, and I can filter down to only words that appear at least twice.