Here's a little more information after reading the original post more closely, hoping it might be of some help.
Is there any form of debt relief in Japan, something that will allow her to continue on with her life without feeling as if she is being pressured by these companies to pay up or suffer endless amounts of interest, something I feel that we've been paying nothing but recently...
I believe there are four "forms of debt relief" in Japan.
The below three are the possibility for your case.
1. ナスツゥナ津遺?挧ナスYツ voluntary bankruptcy
2. 窶戮ヒ?督青ョ窶板敖 voluntary consolidation?
3. 窶愿≫?「テ岩?卍イ窶凖「ツ specific mediation?
(I'm not sure about the terminology in English, they might be wrong.)
1 is to announce one's bankruptcy, so that she doesn't have to pay the debt anymore. 2 and 3 are to reschedule the debt and she still has to pay the debt.
It is technically possible to arrange to apply for one of the above by herself, but normally it is arranged through a lawyer or judicial scrivener. It costs, but surely easier to let experts handle it.
Of course in any case she cannot use loan or credit for a certain period of time (in case of bankruptcy it is for 7 years). There are merits and demerits for each method.
Here's a list of demerits (not complete but some important points) for each method.
1. He name is to be on the list of the insolvent debtors at the local government ツ(ナスs窶卍ャ窶伉コ窶禿ーツ湘ェツ)
Her name will appear on the government gazette (though normally people do not read such gazette.)
She won't be able to dispose her property without permission
She cannot move her address or go on a long term trip without the permission from the court.
(So if she's going to the US for internship, this method is not an option.)
All the posts and mails are forwarded to her trustee who has right to investigate the contents.
2.& 3 She still have to pay back the debt in 3 years or so. If the monthly payment is not affordable, she will have to go bankruptcy eventually.
If she does not have regular income, she'll be regarded totally insolvent and cannot apply for this solution.
Like other cases, she will be on the list among the financial organization.
(That means she won't be able to apply for new loan or credit cards, etc. for a certain period of time.)
She should visit this site, she can get the basic and accurate information about those "debt reliese". It is run by a judicial scriveners office, and if she has questions or need to consult, they offer free consulting services.
I listed only the disadvantages in this post, but of course each method has its advantages as well. If she read the details, maybe she can find which is the best way for her case.
自己破産ドットコム~自己破産の正しい知識と手続きの進め方
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edit:
More sites she can get counselling for free.
http://www.tajusaimu.net/
自己破産の無料相談はみらい司法書士法人
http://www.ninniseiri.net/
Welcome to shakkinn.com
http://www.minnjisaisei.net/
Also a warning - there are many so-called "loan sharks" ヒ?ォ窶慊ソ窶ケテ?窶濃窶ケテ?ステ akutoku kin'yuu gyousha around, who offers their services to "consolidate your debt into one" ナステ倪?ケテ?窶堙戸?ェ窶怒窶ーツサ shakkin no ipponka.
Unless it is a lawyer office or judicial scriveners office, never, ever listen to them. They are pretending to help the desperate debtors but practically draw them into further debt.