If the Tang Empire won, it would say to its opponents: "You damn well behave yourself in the future, or be careful that I wipe out your entire clan. Pay tribute obediently every year!"
<...But a person with potential but no virtue is an extremely dangerous person.
If Japan were to be compared to a person, it would clearly be the latter.
It is currently behaving harmlessly because it does not yet possess that much power.
Just like many potential scumbags act like good men because they are still just losers. Once they have money, they can instantly unleash their endless scumbag tendencies.
Zhao Huan naturally wanted to nip Japan's seemingly harmless nature in the bud.
To paraphrase Chairman Mao: How can one allow others to snore beside one's bed?
It was only a matter of time before military action was taken against Japan. Originally, Zhao Huan thought that economic warfare would be the first step.
But now it seems that instigating conflicts between various factions within Japan is just the first step.
He remembered that a very famous powerful minister of that era in Japan had been born, named Taira no Kiyomori.
This person was the founder of the Taira regime and the first to weaken the emperor's power.
In fact, it laid the foundation for Japan's more than 600-year-long shogunate era.
This person is very pro-Song!
Use him first, then kill Chongde.
Give him another fabricated charge, have someone kill him, and cultivate several more factions to keep causing trouble.
Knowing that Sutoku's death would trigger an economic war and create chaos within Japan's high command, the unrest was irreversible.
At that time, tiny Japan will be nothing more than a persimmon in our hands, to be squeezed however we want!
How do I pinch it?
Of course, the solution would be to draw all the able-bodied men in Japan and send them to the Song Dynasty, to the northwest, to serve as a vanguard suicide squad!
Then, a group of Song Dynasty citizens were sent to Japan to enjoy aristocratic lives while being completely wiped out through cultural and military means.