I prefer sake to akami and chutoro; it is hard to beat otoro.
I can see how sake is a gateway fish! But the implication seems to be that instead of eating salmon, for the real deal we should be eating bluefin. That seems dumb; both salmon and bluefin are pretty boring, they all occupy sort of the same place in Japanese cooking as sesame chicken does in American Chinese food. Everything else is better!
I've found salmon and tuna can approach the level that might be passable in Japan but everything else (swordfish, mackerel, crab, clam etc etc) are whole leagues better in Japan than outside.
I currently live in Singapore where the sushi is actually pretty good but definitely not as good as Japan.
Sake: domestic fish, is never sold as sashimi
Salmon: imported fish
I dont know if its a folk wisdom but the following article claims that when they hear the word sake they think of that old native salmon.
Sort of like when you might call any old man 'Gramps' but when you hear 'Gramps' you think of your own grandfather?
https://tokyoflyfishing.com/fish/chum-salmon-sake-or-shiroza...