Ripe

Two precedents actually: first is Futabayama and second is Terunofuji. Neither of them got promoted following back-to-back yushos when first of them was at Sekiwake.

Not impossible, but his opponent tomorrow is Takanosho who won 13 out of 15 matches they had... that would not be an easy matchup for Kirishima even without Takanosho needing a win to stay in Yusho race! And he might also face Tobizaru against whom he also have a loosing record.

Yes but since they get to face each other tomorrow, whomever loses that match will pretty much be out of contention... especially if Terunofuji wins against Abi.

That also assumes Kirishima wins all the remaining non-Sanyaku matches which is not a given... Meisei, Atamifuji, Wakamotoharu, and especially Tobizaru who he have a negative record against are not exactly easy matches.

Shouldn't the record be 95y9m from 2021 Kyushu Hanakaze (51y5m) vs Fujinokaze (44y4m) bout?

As long as he's the only Yokozuna, he's relatively safe... especially since there is no clear successor at this point. Onosato might become one if he avoid injuries but even then, the best possible case scenario would see him promoted in 2025.

Weirder things did happen... or did you forgot about Tokushoryu winning a Yusho? Did anyone see that happening?

It would also depend on who end up winning the Yusho (if it's not Onosato)... Terunofuji winning his 10th would be treated a lot different then someone else winning his 1st title (especially if that someone is at Maegashira rank).

So Takerufuji will get demoted to Juryo a basho after winning Makuuchi Yusho... that never happened before, right?

Does he get to own it outright or is he just loaning the kabu?

I don't think anyone could order him to take them (maybe Hakkaku could in his role as rijicho) but that does not mean it would not be seen as his duty and obligation to look after ichimon rikishi due to him being most senior oyakata within ichimon and at least nominal head of ichimon.

Ex-Kaio is not head of ichimon... he might have said no, but I don't think that Isegahama as head of ichimon could do that.

But did Isegahama even have a choice? Once the decision was made to shut down Miyagino without spreading rikishi over several heya, Isegahama pretty much remained as only option where ex-Miyagino rikishi wouldn't be a majority... and possibly even more importantly, highest ranked rikishi in stable.

Terunofuji was also an ex-Ozeki who was almost a sure bet as next Yokozuna before injuries forced him to sit out and drop to Jonidan... Back then I had a feeling they put him at M1e instead of M4 or M5 so they would ensure he get to face a full Sanyaku since they really, really didn't want to risk a Maegashira ranked rikishi win back-to-back Yusho.

Well, it will be very very interesting to see how they handle this mess... will they decide to shut down Kasugano as well? Will they force Kasugano into early retirement? Or will they do nothing of importance and just let it slide?