I am wondering if anyone has or knows of the existence of a nonredundant list of all possible kanji readings. Ideally it would include both ON and KUN readings written in hiragana.

I am looking for something that is literally of the format (assuming a tab-delimited, multiline file):

1 あ
2 い
3 う
....
20 ちょう
21 ちゅう
...
100 すい
...
and so on.

Any help on where I could find such a list or input on how I could generate something like this is much appreciated. Also please let me know if the question is unclear and I will do my best to further clarify what it is that I am seeking. Thanks you!

kanjidic2: http://www.csse.monash.edu.au/~jwb/kanjidic2/
There is an xml file containing pretty much all the kanji data including readings.
It should be pretty easy to parse out just the on and kun readings, and then sort them and remove duplicates.

Excellent! Thank you, that will do it.

Note that many of those readings are artifacts (ex: SAN despite being pronounced ZAN because it belongs to a phonetic group that is read SAN), obsolete (no longer used and all word instances that use it can also be read with a newer reading), used only on a single word and its compounds (ex. TOU in 神道 shintou), used only in place and people names, or illusory (the ON reading is never used, but one component of the kanji is from a phonetic group that has that reading).

It sounds like such a list would be useful for creating mnemonic chains for each reading.

If the list also included every kanji having each reading, it would make the whole process considerably easier.

[Katsuo]

Here are a few spreadsheets with readings. As you may know, the government makes a list of approved kanji and readings called the "Joyo Kanji" which has 2,136 characters. They also produce a list of irregular readings for 116 words that use those kanji.
Jim Breen's KanjiDic covers 6,355 characters and includes the joyo kanji data.

Spreadsheets:
1. Joyo kanji and readings The spreadsheet contains 6,355 kanji, but readings are given for the 2,136 joyo kanji only. The spreadsheet is based on the old list (before the year 2010) of 1,945 joyo kanji but the changes (added 196, removed 5 for a total of 2,136) are marked in the adjacent column.
2. Irregular readings approved by government for joyo kanji.
3. KanjiDic (part): readings for 6.355 kanji.

Click on "Website" by my user name for other lists including the rest of KanjiDic.

Thanks. Those are nice lists.

Here is a link to a Python library that can convert between the different types of kana:

https://pypi.python.org/pypi/jcconv/0.1.2

The reason I was interested in all of this is because I wrote myself a small iPad app to test kanji reading knowledge. Just something to play with while I'm on the bus or train.

For anyone interested:

http://youtu.be/nRUw6ULfVvI

I want a list of distractors to use and I wanted it all to be in hiragana.

Well, there is a grander vision for the whole project, but for the time being I just wanted something to play while I am commuting.