You're right. I went back to my original source-article which I've cited a couple times in the past year...
China currently has about 76 submarines, none of them as effective as the Japanese boats, despite 19 of them being nuclear.
I conflated 'nuclear' with 'lithium' over the months since...
https://www.strategypage.com/htmw/htsub/articles/20201115.aspx
But the worry for China about what Japan might do concerning Taiwan is still the thrust. As for the region, I predict Japan will be leading more like the 'old America', rather than the tepid, hesitating 'new' format.
We all know that when a power vacuum surfaces (Asterisk and his incompetent stooges have definitely taken the "we're outta here and we got no plan" tack), somebody will step up to fill that vacuum. Let's hope you're right and it's Japan. I'd also put some cash on the Aussies and Kiwis stepping up if the ChiComs start looking south.
I meant to mention regarding Japan and her nuclear "allergies", that that was the key reason (as I understood it) that Japan would not permit nuclear-powered vessels in her ports. To that end, the last oil-fired U.S. carrier that was home-ported in Japan was the USS
Kitty Hawk was the only US carrier they would allow. Dunno if the nuke prohibition is still in place, though...