What does it mean to issue yen-exchange flat bonds now that the yen is seriously depreciating?

News Within this year, the Strategy and Finance Ministry intends to issue yen-exchange flat bonds. Why does this matter? 1. It costs money to abruptly stabilize a nation's currency. To intervene in the dollar market, we need dollars, and to intervene in the euro market, we need euros. Create a fund for this type of funding, then use the funds to issue dollars or euros to purchase 2. The most of them had previously issued dollars and occasionally euros, but this is the first time the yen has been...

원문링크 : What does it mean to issue yen-exchange flat bonds now that the yen is seriously depreciating?