「今後バンクーバーにいる、もしくは日本に戻る、どちらにしても、７月に一度日本に行きます。」って、
I will go to Japan in July either going back to Japan for good or not.
で通じるでしょうか？？？
それとも、〜にかかわらずという表現でしたほうがいいのでしょうか？

"Wether staying Vancouver or going back Japan, I have to go back to Japan in July." 　

→ Regardless of whether I stay in Vancouver or go back to Japan, I’m going to Japan in July.

Hmmm、なんかwordyですよね。もう少しカジュアルで「I’m not sure whether I’ll stay in Vancouver or go home to Japan. Either way, I’ll be going to Japan in July.」かな…
　

I’ll be going to Japan in July?????
That’s not proper English!
Just say,
I am going to Japan in July. 　

↑Neither is the use of more than one question mark, nor the use of a line feed after a comma, nor the absence of quotation marks around quotations.

Hey Mr. EIGOSENSEI、「無回答」で隠せないよ. It seems like you are still sore about me pointing out that you need to clean up your English if you’re going to teach...
　

Question marks, quotation marks, blah blah blah...
Who cares if you are not writing a business letter or something, moron.
You’re not the only one who can speak English, OK?

Dude, seriously, you need a good friend. Cuz I can totally tell that you are kind of person who think you’re the best and everybody else can’be as good as you.
I hope you’ll find some kind of fun in your life beside staring at your computer a whole freakin’ day. Geek! 　

I’ll be going toでもI am going toでも
どっちでもあってるんだから、別にいいじゃん。
こういう醜い言い合いは時間の無駄ですよ-------。
　

当たった！笑 　

I will be going back to Japan in July for sure but have not decided whether to return to Vancouver after that.

...don’t know whether I can - -

I must be a geek for replying ?