Is it normal to hire your own administrative scrivener (行政書士) to help a company sponsor your work visa?

Hi everyone, I’m planning to move to Japan in about a year to start a Master’s and then transition into full-time work. I’ve worked 10+ years in international trade and supply-chain management and will be job-hunting actively once I’m there.

I’m considering a strategy for smaller companies that have little or no experience hiring foreigners. The idea is to offer to hire my own 行政書士 (gyoseishoshi) to manage the visa application so the company doesn’t have to handle paperwork or figure out the process from zero.

I’d like to know how this is viewed in Japan and whether it actually helps.

Are candidates usually the ones offering this, or would it seem unusual?
Does having your own scrivener really make a company more willing to sponsor a visa?
Who normally pays the fees (¥50,000–150,000+)? Company, candidate, or shared?
And if the candidate pays, does that create any legal/administrative issues for the employer or with immigration?

Any experiences or insights would help a lot. I want to understand what’s realistic and how this is usually handled.

by Osaka_Gaikokujin