HN user
There is also this study (https://doi.org/10.1002/trc2.70101), showing some benefit regarding cognition in alzheimers patients. AFAIK it's the first human trial in this context though, so it is still very preliminary.
Thanks for sharing, I'll check it out. I am currently using Wanikani +Tsurukame to learn Kanji, from your description your approach sounds similar with more customization?
I just had a look at it, love that it also teaches the stroke order, this is something I have no tool for at the moment.
I have started learning japanese roughly 6 months ago, and I luckily stumbled upon this fantastic Anki deck: https://ankiweb.net/shared/info/911122782
It focuses on teaching grammar and vocabulary through listening comprehension. The creator has put an immense amount of effort into it, to a point where I cannot believe its free. I highly recommend it.