Om - Once again ... No "Ji" please and I am no expert.
---------------
If someone recieves a Gift of a Million Yen .. then he does NOT have to pay back .. since this is a "gift". He will not have to pay interest also and hence there is NO carry involved.
There are NO loopholes (Of what i am aware of) ... Only Corporates can do an ECB or FCCB. Individuals cannot do it. Even if individuals do.. then they will have to find a "Financing" bank in Japan who is willing to lend them.
When Yen Rallies.... It does so more then 4% in 48-50 Hours. ....Look at NZD-JPY. That particular pair had the biggest carry and when the meltdown happened this week.. The NZD lost 9% in a week against the Yen and all the potential carry profits have gone out of the wind.
Historically most famous "Carry-Unwinding" happened in Aug-Oct 1998 when LTCM Failed. $-Yen fell from about 147.63 to 111.53 in these three months (Yen gained 25%) leading to only losses on those who created "Carry Trades".
The most severe fall was between 02-Oct-1998 and 09-Oct-1998 where the Yen gained 17% in a week. ... It gained 10% in 3 hours sometime during the week...showing a Liquidating FX Market.
Note this was the reaction of $-Yen... while the more popular highyeilders "Carry" like "NZD-JPY", "Aud-Jpy", and loads of other crosses... The fall was extremly large. ... Yen gained 100% against the NZD in 1997-1999 leading to "the Death of Carry" at that point of time.
This round of Carry Trades began in 2004 when the Bank Of Japan Interveined to stop Yen appreciating against the Dollar. (It was aparantly the biggest ever FX intervention worldwide). That created a floor for the $-Yen and the "Carry became the King" once again.
Note historically Carry Trades have a big fall ONLY after Fed starts rate cutting on the Dollar.. Which has NOT happened this time yet. So this latest fall in the $-Yen looks only a wobble which could recover soon.
The second biggest currency used for carry is the Swiss Franc (CHF) which also has very low interest rates. I think Sandy can use that to create a carry (if he wants) as he is based in Swiss currently.