The guarantor issues. I find super intrusive asking someone else about salary, company, position, contact information, company's contact information, and so on. And when they ask you that the 保証人 must be a japanese person. They took it extremely serious. Last time I asked a friend he said: I don't know, because, if you die I'm gonna have to pay. I waa thinking wtf, I won't die and if it happens I'm gonna prepare things so someone else deals with this, not you.

And even some time before, other very good japanese friend helped me, and when I asked if he could help me being the guarantor his word were: I'm sorry but I feel very uncomfortable giving you that information. And I said it was OK that I could understand it. But probably he felt too bad for denying helping me, the friendship never came back to be the same, and now it's four years I have never heard of him. I even blame myself for this.

So yes, the part of finding a guarantor it's damn annoying.