No Japan or China or anyone else who owns treasuries can not control the yield on the US Treasuries because that is controlled by the Fed. The Fed has near infinite power to intervene to make the treasury yields be what they want.
If a country had a lot of US reserves they could increase the supply of dollars on the international markets through a lot of selling. But this is essentially what the US treasury is doing by using dollars to buy yen (with an extra step through Euros to make it more politically palatable)
Your mistake is assuming that the dollar supply and the treasury yield isn't a slider that can be zipped back and forth by the Fed.