Imma be real with you here chief, I don’t think theres a lot of pubs (or sake bar in this case) that sell food under-seasoned.
At the very least they would slightly oversalt their food cuz you know what eating salty food do to you: You get thirsty. That and kidney stones but well…
Once you’re thirsty tho, you’ll be more likely to order drinks and tadah, money.
Sure it’s not guaranteed that that’s what’s happening here, but eh idk