I'm coming around to the Wonkish view on this... I don't have access to the inside and professional information he does, but just looking at some pure headline numbers. The Japanese debt is increasingly composed of government JGB as that is the sector of their economy that by far leverages up the most.
While the financial crisis of 2008 stopped the crazy mad leveraging in the US and Western Europe, JGB leveraging has just continued and even accelerated as Japan has run a larger government budget deficit to make up for the 2009 recession, and the Tsunami recession. During the 1990's and 2000's it appears that some of this was counter-balanced by deleveraging in the Japanese private and corporate sectors, as described by Richard Koo in his book 'The Holy Grail of Macroeconomics'. However, in recent years it has reached a point where private sector deleveraging can no longer make up for JGB leveraging because JGB have taken up the lion's share of the total debt market.
Further, now you have that the trade surplus has essentially disappeared, part of which due to global recession, part of due to the Fukushima disaster necessitating a ramp-up of energy imports (although I'm not sure what share this pulls in Japan's total import), and part of due to the strong yen.
So Japan must fall back on its existing net creditor position within the world. You saw this happening at the Fukushima disaster. The yen spiked as there was a sudden repatriation of foreign assets to cope with the disaster. In other words, they may still have one more wind in their sails, which may last who knows how long. But like the cat with nine lives, eventually it will run out.
Wonkish, I know we tend to strongly disagree on this, but what do you think of the possibility of monetary easing and Japan 'inflating' their way out of the situation? It seems that this could happen either to forestall a crisis, or to reflate after a crisis, in a Keynesian style. Hyperinflation is not a concern in my mind because generally, that is the result of a lack of real resources (supply is crushed, as in Zimbabwe and Weimar Germany, the most notorious and extreme historical examples), or in the more likely variant of hyperinflation, as in Latin America (demand and spending exceeds productive capacity) or any country in the wake of a currency crisis, the result of large and sudden foriegn withdrawals of hot money. It does not seem to me that Japan faces these particular problems, and a significantly weaker yen may be just what it needs to regain competitiveness.
The larger problem in Japan has nothing to do with any of this though, it is a general malaise in their society, a sort of fatalistic acceptance of permanent decline, which is quite sad. From that perspective, a total collapse or 'cleansing' of society, WWII-style, might be a good thing.
First, I'll say that I wouldn't count on their being that much money outside of Japan to repatriate. In a normal economy, sure. Japan isn't normal though. Do you have any idea how hard it is for Japanese money to get out of their country? I've actually been involved in conversations about this topic for the last several weeks because a small client has a business that sells from the US to Japan and they need to get the money back here. Japan has approved lists for wire or ACH transfers. They have to be initiated at the bank in Japan in person while going through an inquisition of questions that sometimes takes hours(for every single transfer). They don't have checks so you can't mail them. They don't have money orders so you can't mail them. With the exception of things like paypall or a few other creative mechanisms the fact is that you can't get the money out. So with the exception of a handful of large Japanese companies that have given permission to move money freely I doubt there is as much money to repatriate nor the desire to repatriate(given the challenges to get it back out again) in Japan relative to average country.
In regards to your question, I must first establish that me and you see a little bit differently as to where inflation comes from. You can get into demand pull, cost push, real resources, etc. and any other idea that modern Keynesians try to use to justify the complete and utter failure and embarrassment the Philips Curve was(a failure so big that it came close to killing the school in its entirety and the reason why most Keynesians today now refer to themselves as "neo-Keynesians"). For us monetarists our rationale for inflation just makes so much more sense:
Lets say you have 1,000,000 widgets in an economy and you have a money supply of $1,000,000 at that given time. Simple math will tell you that those 1,000,000 widgets will have an average price around $1 a widget. I mean there is a reason why the economy is currently sitting at around $16 trillion and M3 currently is about $15 trillion(keep in mind that their additional near moneys that aren't computed into M3 and so its never an exact calculation). Now if you increase the money supply from $1,000,000 to $2,000,000 and the same number of widgets exist before and after that change then the price will eventually reflect that change and you will see prices at approximately $2 a widget($2,000,000/1,000,000=$2). Now I completely will admit that is definitely an oversimplified explanation because the money supply is affected by fractional reserve banking, to some extent shadow banking, the velocity of money is a key in determining the above, that you can technically export some of your inflation when another country is trying to peg on your, and that temporarily prices can be sticky or spike, but in general over time prices have to approach the fundamentals in the money supply just like a stock price has to eventually reflect the fundamentals of its earnings and balance sheet. Now you can disagree with this if you want, but I would be surprised if you disagreed with the next paragraph.
The principal issue with the question of Japan trying to inflate through monetization is that once they start doing at all in earnest they can't just do it a little bit. Capital markets wont allow it with their current situation they have to print almost all of it. So allow me to play this out for you:
1) Japan's cost of capital rises 50 basis pts and Japan is now worried that if they don't do something the cost of capital could rise another 150 and their debt service will outstrip their revenues forcing a default. So here we have Japanese officials going into crisis mode here and lets say they are going to monetize a chunk of debt to try to keep things under control.
2) So keep in mind they are about 220% of gdp in debt so if they actually want to come close to actually even putting a dent into their debt service they are going to monetize a pretty large chunk. So from a debt service perspective monetizing 20% of gdp in debt probably wont even make up for the 50 basis point move that just happened. Its also only 1/11th of their total debt. But from a money supply perspective printing 20% of your GDP is huge. Its at least going to end their deflationary state overnight. So here lets say they do it and print 20% and lower their debt service a bit.
3) I can guarantee you a quick printing of 20% of your GDP is going to cause foreign exchange losses immediately for foreign any foreign owners and discourage any foreign buyers. That happens day 1. That alone should result in another 50 basis pt rise in their cost of capital making this entire amount of printing meaningless to their debt service. The inflationary affect will be pretty quick. If it only erased the deflation and created 1% inflation(I mean just that little) their cost of capital has to rise because of that as well. Because their whole GJB market rests on deflation to have long term interest rates at only 2%. You eliminate the deflation and market participants aren't accepting below normal interest rates so they'll spike Japan's cost of capital on that as well.
4) So they see this and go owe $hit we need to monetize another 40%. This announcement causes an even bigger firestorm than the first and JGB prices just start crashing and the implied yields just start reaching out of control. So here is guaranteed where you have to end up relatively quickly if you are Japan trying to monetize....
5) Where your going to end up is the amount of monetization necessary to produce budgetary surplus because of lowering of the debt burden because they will not be able issue new debt without extremely punitive interest rates. So their current average cost of capital is lets say 2%. At that percentage they probably can monetize 180% of gdp of debt and produce a large enough surplus(plus maybe some help from the IMF if it still exists) to be able to retire the remaining debt without being able to roll it. Now if you think a 180% increase in the broad money supply(that hasn't even been relevered yet through their banking system which it will eventually) isn't going to produce hyper inflation I think your living out of reality. It doesn't matter if you have all of the resources of the world you increase you print 180% of gdp of debt you'll have rampant inflation.
Now what you should discover out of that explanation is that I just explained to you Greece as well. You can't a little bit inflate your way out of a sovereign debt crisis and you can't a little bit default on your debt to get out of a sovereign debt crisis. Just think about what the implied yield on 10 year Greek bonds was when they announced the first "small" haircut. Markets may be a little bit less harsh to monetizing an equivalent amount of debt, but there is going to be a reaction. And that reaction is going to increase yields which will end up propagating further monetizations because the sovereign will not be able to keep on paying the yields that the market will demand.
So I think of course in Japan you are going to either have monetization and an attempt to inflate their way out *or* they are going to default. But in each case at least 80% of the debt will need to be covered. Either an 80%+ haircut in a hard restructuring or monetize at least 80% of the debt(not 80% of GDP, 80% of the debt which means at least 170% of GDP of debt). Mark my words there is no way that they could get away with monetizing 25% of their debt and that lasting long. No way! Its either almost all monetized or almost all defaulted there or potentially a combination of the two that adds up to almost all of the debt there is nothing that comes back less.