Are you referring to the scrolls found in the single player or the overall feel of the game?
Overall feel of the game. Like for example the Squid sisters a much more japanese influences with the sushi on their head, the white gloves and their mannerisms, whereas the new two in Splatoon 2 feel very westernised, many of the more japanese manerisms of their predecessors are gone.
This is just one example of many.
It's a game made in Japan for all people.
I believe you just described Splatoon 2 but Splatoon 1 is not like that in my opinion. Splatoon 1 feels unapologetally Japanese in feel and origins. The world loved Splatoon 1 for this still. A game can be rooted in it's own culture and origins and still be loved the world over.
Okami is a very Japanese game. However the whole world loves it for that exact reason. It's a slice of Japenese culture and history and experiencing that as a gaijin is really amazing. It opens up our eyes to their culture and helps us to appreciate it more. Of cause this is just one game of many that have done this.
Also the Bower's kingdom level of Super Mario Odyssey is totally Japanese themed. The whole world loved that stage of the game too. Another little example.