South Korea's vice fin min says closely monitoring financial and forex markets

The USD leapt higher with the shock CPI result:

• Forexlive Americas FX news wrap: USD soars on CPI, equities crushed

So far we've had some verbal intervention out of Japan:

• Japan's Kanda (top FX guy at the MoF) says is concerned about the recent sharp yen moves

South Korea getting in on the act now with their own verbal warnings.

As for Japan, the words are really not going to be enough, but its not as if they can do much for now.

I posted these earlier, of relevance:

• Here's what to watch for to warn of imminent Bank of Japan (BOJ) yen intervention

Solo Bank of Japan intervention seems unlikely:

• USD/JPY BOJ intervention watch - intervention seen as unlikely without US coordination

USD/

USD/JPY The USD/JPY is the currency pair encompassing the dollar of the United States of America (symbol $, code USD), and the Japanese yen of Japan (symbol ¥, code JPY). The pair’s rate indicates how many Japanese yen are needed in order to purchase one US dollar. For example, when the USD/JPY is trading at 100.00, it means 1 US dollar is equivalent to 100 Japanese yen. The US dollar (USD) is the world’s most traded currency, whilst the Japanese yen is the world’s third most traded currency, resulting The USD/JPY is the currency pair encompassing the dollar of the United States of America (symbol $, code USD), and the Japanese yen of Japan (symbol ¥, code JPY). The pair’s rate indicates how many Japanese yen are needed in order to purchase one US dollar. For example, when the USD/JPY is trading at 100.00, it means 1 US dollar is equivalent to 100 Japanese yen. The US dollar (USD) is the world’s most traded currency, whilst the Japanese yen is the world’s third most traded currency, resulting Read this TermJPY
JPY The Japanese yen (JPY) is the official currency of Japan and at the time of writing is the third most-traded currency in the world behind only the US dollar and euro.The JPY is used extensively as a reserve currency and is relied upon by forex traders as a safe haven currency.Originally implemented in 1871, the JPY has had a long history and has survived multiple world wars and other events. This was followed by the creation of the Bank of Japan (BoJ) in 1882 and the full oversight of the JPY by The Japanese yen (JPY) is the official currency of Japan and at the time of writing is the third most-traded currency in the world behind only the US dollar and euro.The JPY is used extensively as a reserve currency and is relied upon by forex traders as a safe haven currency.Originally implemented in 1871, the JPY has had a long history and has survived multiple world wars and other events. This was followed by the creation of the Bank of Japan (BoJ) in 1882 and the full oversight of the JPY by Read this Term dropped on Kanda earlier:
• The 4 things to watch prior to Bank of Japan FX yen intervention