Japan Government and BoJ intervened in the FX market today, Nikkei reports

• Says desks conducted rate checks
• Japan intervened via USDJPY, sources say

Reported intervention of this kind follows a well-worn Japanese sequence: verbal escalation from the finance ministry, rate checks from the dealing desk, and only then actual dollar sales for yen, with rate checks alone having historically produced a sharp but often short-lived move as participants test whether size follows. Past episodes have tended to occur when the pair moves fast and one-sided rather than at any fixed level, and the distinction worth drawing is between unilateral action, which has historically slowed or reversed a trend only temporarily when the yield differential driving it is intact, and coordinated or differential-narrowing intervention, which has had more durable effects. The actors are familiar: the Ministry of Finance directs, the Bank of Japan executes as agent, and both have prior form of acting in size during thin liquidity windows to maximise the mechanical impact on the pair. The transmission runs through spot USDJPY first, then into yen crosses, with knock-on into JGBs and exporter equities the established pattern when the move sticks. What matters next is confirmation of size and frequency, since repeated rounds have historically signalled a defended zone rather than a line, and whether the underlying rate gap with the US is narrowing, which is what has ultimately determined whether intervention episodes marked a turn or merely a pause.