Two more have joined the five. Seven Russian navy ships spotted today off the north east coast of Japan. More to join in.
Quote: “Russia's Defense Ministry announced that it will conduct the large-scale military exercises in the Pacific from June 3, with around 40 Pacific Fleet vessels and others taking part.”
https://www.nippon.com/en/news/yjj2022061000600/amp/#
Better than average chance that the Chinese will join in, I wager.