Companies in Japan that accept interns?

Hello, I'm a student of Microcomputer Systems and Networks in Spain and I'd like to do an Erasmus program to go to Japan to do my company practices.

l've been looking for companies and writing emails to them, but some don't respond or others ask me for money to do the company practices (?)

I need help to know if anyone knows of a place where I can ask if they will accept Grado Medio" (That's in Spanish, I don't know what the term "intermediate degree" is in English or if there's something similar, but basically they are studies that accredit you as a "Technician" in whatever you have studied) students 🙁 Can someone help?

Idon't know if I've explained myself well, but I need help if possible, and well, if someone wants to explain my situation better, ask me!!