I agree with you completely. Japan has an extremely positive image in Iran. Probably the most positive. But the big picture is abit different. US wants to turn Iran into a puppet state. And they are using Turkey and Takfirism to this end. I hope Japan can make its own mind on Iran.
I have optimism that the recent nuclear energy deal between Iran and the US ushers forth a wealth of new opportunities. For one, it is important that the United States needs to work with the Iranians to stabilize the war torn levant. ISIS is the common foe. As for Syria, well, I believe American foreign intel realize now who and what the main instigators are -- after the failure in strategic visage the last 3 years.
As for Japan ; despite American arm twisting, we have told their side of our imbedded interest in Iran. And they understand the realities of this.
Unfortunately, my friend, we have to understand the role of these radical neo-cons have on US foreign policy. But it is changing. Slowly.
I really hope too. Iran can learn alot from Japan. By alot, I really mean ALOT.
I hope the relationship between Iran and Japan grows. Forever.
I really LIKE your optimism ! Here is to growing, and continued Iranian-Japanese cooperation !
May our future be interlinked for the common good. INSHALLAH.