Soviet Stalin Russia was ready to step in and seize Sakahlin Islands and others in so called dispute since the days of the invasion of Port Arthur by Japan.
They waited to the last days when Sorge their spy in Japan let them know they were going to capitulate (even so, there are some who have speculated the military coup that failed to prevent Hirohito from directly surrendering, had suspicious backing. Most do not and think it was Tojo’s last gasp). Either way the country was preparing for complete national suicide to fight an invasion— that would have cost them 2 million civilian lives and nearly a million Allied lives (UK,US,ANZACS,etc.). The bombs 2 of them was almost not enough— but prevented these losses. The Jap Navy knew it was over long before- but the Army fanatics would not let go.
By the war's end, Tojo had already been sent away in disgrace / sidelined for more than a year (prompted by the fall of Saipan - but not only because of that).
Two days after Tojo resigned, the Emperor gave him an imperial rescript offering him unusually lavish praise for his "meritorious services and hard work" and declaring "Hereafter we expect you to live up to our trust and make even greater contributions to military affairs". - Wikipedia
In other words: He was removed from power and likely expected to go and raise cucumbers in his garden for the remainder of his life.
Regards,