In terms of my personal growth in the language, I feel like my pronunciation was what changed the most. I became much better at speaking like a Japanese native, and multiple people even told me that my intonation was great, and that I sounded like I was from Tokyo!
In addition, my speech speed improved too. I feel like I can speak more clearly and quickly now, and less like a child learning the language. Plus, I was really happy that people could simply understand what I was trying to say!
I miss Japan so much, and as I deal with my new jetlag, I'll be thinking up ways to return to this magical country!