Why did Yen fell so far ?

Most developed country currency in Asia maintain the 1.3 currency exchange rate

USD to WON: 1.375,10

USD to SGD: 32,53 

USD to New Taiwan dollar: 1,34

yet Japan sat close to 1.6 currency exchange rate at 157,83

which is similar to most developing country in south east Asia

USD to Peso: 58,41 

USD to IDR: 16.114,55

USD to Ringgit: 4.66

Why ?

only Australia and new Zealand is similar at 1,48 and 1,63 for developed nation nearby

is it due to Japan zero Interest rate ? alot of capital flight ? or the Trade deficit ?

is quite surprising as an Indonesia seeing Japan reach Indonesia lvl of shit currency when less that 5 year ago 1 JPY is almost 150 IDR

guess that means more Japan vacation this year for me