A bit of advice, I've yet to hear about a western manga artist making it big with manga about japan.
Infact the only western manga artists i do know arent really what one would considor big-time in the comic industry.
My advice is if your still going to try and make a "realistic" manga about a country you only have tit-bits of infomation about, i suggest you research this new manga idea to death, i mean big-time.
Also dont expect it to ever sell in Japan.....ever.....sorry its a harsh lesson but i learned it myself and reality is more important then fantasy, the Japanese entertainment industry apart from hollywood movies and some western pop-music is entirely self-sustaining, their manga is their own, most of their music is their own, the anime and manga industry especially is very self protective and defensive against outside foreign intrusion.
Perhaps a story about an alien girl comming to aschool in your country or something, that way you know the setting of the comic off by heart and since the girl is an alien you can take all the artistic liberties you want.
Good luck with your little project, i hope you make some success of it, i've had plenty of manga projects in my teens, but i eventually met the truth that it would take a really special and dedicated artist to break the limits and fight the world to do what no western manga artist really has, and get a real job :S, hopefully you'll be different, who knows.
Also i apologise if the responses seem less then entirely ultimately helpful, many of the regular members here are adults who live/lived in japan or are Japanese, as such we are detached from the be nice to everyone beyond reason attitude that i admire from the Japanophile community, were not any sort of real Anime fans as you would understand the term to mean, and this isnt an Anime forum, we do however try to share our experience of Japan with new-comers to help them in anyway we can, so if you can bear with our sometimes blunt attitudes im sure we can teach you what you need to know of japan.
Enjoy your stay.
