plot hole : he needs to use japanese language for the spell "wind return" , but he can use the isekai language for the spell " ikyuras kyuora " just fine .
now i get it : at the end , he buys a Xbox Zero because his favorite consoles were from Sega , and in 1990s , Sega was in a console war with Sony and Nintendo , so he has a grudge against them and refuse to buy their products , like the Play Station 4 and Nintendo B!tch , er , i mean Nintendo Switch .
also , i just found this video about oji-san : https://www.youtube.com/watch?v=MeLU9sa_9aY .
hft5ffrd