Ah, I will try that, thanks! In the meantime I found a nice overview of the player's attacks in the
Index WIKI, and in fact they also list down+triangle.
Btw, there is another Kanji I can't read: In the gallery on the "Achievements" page (first menu item), it lists things like how many hits you made. What does the second line say (the one starting with "perfect" in Katakana)? It's the only line where I still have 0 points.