There is actually quite a Japanese communuty in Peru. Even a few Japanese schools in Lima. Lima street where I spent alot of time in lockdown during Covid had a Japanese-Peruvian (guy) couple also stuck there. The Peruvian guy was a muso who had stayed in Japan after touring there, his muso mates had returned to Lima after many years in Nippon.
Peruvians claim they are the cuisine capital of Sth America. They are proably right. One of the most well known resturanats in Lima (well out of my price bracket) Maido is
Nikkei cuisine, or Japanese-Peruvian cuisine
https://www.kuodatravel.com/michelin-starred-restaurants-in-lima/#:~:text=Nikkei%20cuisine%2C%20or%20Japanese%2DPeruvian,that%20bridges%20two%20distinct%20cultures.To me Peruvian food is basic, but really well done & yummy. But then my experience, is just local cheapish restuarants or home cooked food. Not high end stuff at all. It's good, but to me Asian/Indian food has a lot more flavour
Ceviche (can be spicy, Peruvians love some chilli)
Lomo Saltado (sliced beef with tomato and fries on rice)
Papa a la huancaína (potato in a creamy spicy sauce, with egg)
Causa (a filled eg tuna, potato mash)
Pollo a la Brasa (roasted chicken)
https://www.seriouseats.com/essential-peruvian-cuisinePeruvians soups are also pretty good. Unless you liked soda stream when you were a kid, or want diabetes avoid Inca Cola. Very average with a bubble gum flavour, but Peru folk love it.
Edit - just before Covid (about Jan 2020) I spent a month living in upmarket Miraflores in Lima. Learning Spanish. The language school organised accommodation with a host family. Me, a Canadian Jewish guy from Toronto & another young guy from Chicago. The Chicago guy a total foodie who in his 2 weeks proceeded to visit the best 14 restaurants in Lima each night. He had an organised bucket list. 3 course meals with a bottle of wine. He would have spent more on food & booze, in those 2 weeks, than I would have in 6 months in Peru.
Some interesting yarns between the 3 of us over that time. The host family matriach scolding us if we lapsed into Ingles. That's why I love travelling, meeting other folks, and being exposed to completely different lifestyles. Getting totally out of your narrow minded bubble