I am on a visa-free entry right now which i will convert into a long-term visa soon.
The money which I am transferring into my japanese bank accounts are not Income which I have earned.
It is also not income which my company has earned.
It is a capital injection of cash into my representative office's Japanese bank accounts in Japan which are under my own personal names.
Why would the Japanese Tax Authorities consider capital injection of cash into representative offices or branch offices of Foreign Companies to be income?
Why would I be taxed on injecting cash capital into my representative office of my Foreign Country "C" PLC?
As I clearly stated, and as you will now know from having had me teach you, and in addition to the documentation which I provided for you, as a tourist you are not subject to any income tax in Japan. Why you are trying to start an argument over this is
slightly interesting, but irrelevant to your situation.
Once you become a resident in Japan, you are subject to tax and national health/pension obligations. Learn this well, finance major. At this point you are merely a tourist, and the NTA doesn't care what you call this money, or how it came into your possession.
If you are a resident here and you have income remitted to you from overseas, it doesn't matter if it is earned or unearned income. Again and again, I refer you to the Tax Guide.
Should you become a resident in Japan and expect to use your rep office as a slush fund in order to minimize or eliminate your income taxes, you should probably reacquaint yourself with IFRS.
I call your PLC a shell company because that is precisely what it is.