Wow this project is still happening. Really wish I could help but I know next to nothing about this stuff.
just spent some time identifying text in images. (the stuck in a hospital thing tends to give you time to do such... sigh). 4 images down for this game. (38 for other games...)
also took some time to translate a little online. Focusing is a little hard right now so I am kinda all over the place. doing what I can. I had a usb hard drive go down. 3 to 5 months of various projects work down. yeah and no money to fix this... That is what I get for buying from a non legit seller. (read clone drive stupidity and last time I shop there.) so tempted to do it myself. so very tempted but that could just be the meds talking...
I have located bmd models in this game. have successfully rebuilt a couple of them into files that I could rip from and edit. Have yet to try rebuilding the images into more mainstream nds ncgr, nscr format. Which would simplify things a crap load.
it looks like 4230=あ, 4430=い, 4630=う
That's standard Unicode: http://unicode.org/charts/PDF/U3040.pdf
It's stored in the files with the least significant byte first, so that's why you see 4230/4430/4630 instead of 3042/3044/3046.
OH, perfect! Thanks! That will make building the table a ton easier. I'll have to check and see if the symbols and English letters are coded that way too.
EDIT: I got a kana and miscellaneous character font table done, link is below. I'm not really sure about the kanji though, or what to do with this table now. There was a guide that said to use a program called Thingy, but it won't run on my Windows 8. I've tried running it in compatibility mode too.
https://dl.dropboxusercontent.com/u/37455278/Itadaki Street DS/table.txt