Using Spaced Repetition Software (Anki) I've managed to learn and retain the 2200 unique Japanese characters in RTK and the ~1400 words required for the level N4 JLPT test. I passed the JLPT N5 last year.
I've learned the worlds countries/flags/capitals now and I'm making my way slowly through paintings. The stats really motivate me, it is definitely an efficient way to learn. I tried with paper flash cards at the beginning - but it would take a lot more dedication to learn that way
These are the kanji I've learned to recognize:
Doesn't look too bad when it's laid out like that huh? Too bad I should learn another 800 or so for family names.
If you weren't aware, I am working with some friends building a 3d photo booth that captures your digital avatar. Initially, most of that work was building a room with 70 cameras, but now most of my time is spent building custom gifs for our emoji keyboard.