how many possible On’yomi there are? Do you feel like there are an endless number of on’yomi for these pesky Kanji?
Well I did some checking, cross-referencing and then re-checking Eventually I came up with this list of 331 possible on’yomi. Of course, let me know if there are any mistakes you find. (Just to be clear, I only checked with the 2136 jouyou Kanji. More obscure Kanji may have more obscure on’yomi.) I hope this helps!
I wondered about that a lot! I started to use a previously learned kanji as a mnemonic for a new kanji with the same reading and it worked wonders for me.
It basically separates the jouyou kanji (which is all of them) into the kyouiku kanji (elementary school kanji, everything but red) and everything else (red). Within elementary they are also broken down by grade.
I wonder whether Japanese have tongue-twisters that link kanji with the same or similar reading, something like:
Peter Piper picked a peck of pickled peppers
A peck of pickled peppers Peter Piper picked
If Peter Piper picked a peck of pickled peppers
Where’s the peck of pickled peppers Peter Piper picked?