Technically speaking, in Japan, the interventions are most commonly performed by the MoF, rather than the BoJ. Given the argument, it's a relatively significant distinction.
Point is that the government's (I include the CB) control of its currency is essential. This has been demonstrated amply by the recent European mess. Whether the government then chooses to abuse this ability or not is up to them. Furthermore, one man's abuse is another man's desperate times/desperate measures sorta thing.
Point is that the government's (I include the CB) control of its currency is essential. This has been demonstrated amply by the recent European mess. Whether the government then chooses to abuse this ability or not is up to them. Furthermore, one man's abuse is another man's desperate times/desperate measures sorta thing.