Kapstream Capital Kumar Palghat says the problem for Japan's policymakers is that whenever it is a risk-off environment, the yen becomes a safe haven.
Japan will require the agreement of the other G7 members before it can intervene in the currency markets, believes ANZ's Khoon Goh.
Central banks usually tend to intervene when market liquidity is low, says Merk Investment's Axel Merk.
Haitong Intl Securities Group's Kevin Leung says that Asian market's upwards moves are being driven by short-term news flow about the yen and Brexit.
Westpac Bank's Sean Callow says the BOJ would not be the only central bank to potentially intervene in the currency market if U.K. votes for a Brexit.
Former Japanese Vice Finance Minister Eisuke Sakakibara says policymakers won't conduct a yen intervention because of opposition from the U.S.
Parry IntlTrading's Gavin Parry says Japanese policymakers will likely discuss currency coordination, particularly after the big jump in the yen.
If a Brexit does happen, the USD/JPY pair could easily fall below 100 levels and even touch 95, notes BAML FX Strategist Shusuke Yamada.
Huntington Bank CIO John Augustine says markets will remain hostage to the Brexit opinion polls until a decision has been reached.
BNP Paribas' Mirza Baig says BI's 25 basis points rate cut on Thursday is a sign of confidence in the rupiah's strength and stability.
The rally in the Japanese currency doesn't appear to be stopping anytime soon and its strength has traders worried it could quash a struggling economy.
Sterling rallied from a two-month low against the euro, extending gains after British police said British lawmaker Jo Cox died.
The central bank's decision sparks speculation on whether policymakers will intervene to stop the currency's rise.
DBS Bank Senior Currency Economist Philip Wee says central banks will be standing by until the Brexit vote is over.
Some currency pairs are moving in an unusual manner to central banks' decisions, says Macquarie Private Wealth's Martin Lakos.
In a risk-off environment, high-beta currencies will come under a lot of pressure, says Barclary's Mitul Kotecha.
WisdomTree Japan KK's Jesper Koll, Schroders Investment Mgmt's Rajeev De Mello and Barclays' Mitul Kotecha discuss why the USD/JPY pair is falling.
The BOJ will keep expanding the monetary base at an $760-billion annual pace and applying an -0.1 percent rate to balances at the central bank.
Barclays' Mitul Kotecha explains that the BOJ will not make a rate move Thursday because further stimulus will not likely help weaken the yen.
The Fed's decision to stand pat might take the pressure off the dollar and support risk appetite, notes CCB Intl Securities' Mark Jolley.