Japan's Finance Ministry's Vice Finance Minister for International Affairs Masato Kanda spoke with media earlier in the day in Tokyo, saying that Japanese authorities were in close contact with U.S. Treasury Secretary Janet Yellen and other overseas authorities almost every day on currencies and the broader financial market.

Post is here:

Kanda's comments are a direct reference to intervention. Despite this the yen did basically nothing. But, its starting to edge higher now.

USD/JPY update:

usdyen kanda jpy intervention 04 July 2023

ps. I posted this over the weekend: