Reading a guide is definitely a part of the plan ... I was more looking to narrow the choice, as I'm interested pretty much in everything. I wouldn't want to spend all the time in Tokyo. I appreciate both technology exhibitions, partying, food, temples and nature. I don't know when is the next time if ever I will get a chance to visit Japan and therefore would like to experience as much as possible, without spending half of the time on traveling though. Somebody told me that mount Fuji is probably a bad idea in October, if there is any additional information of a similar kind - I would appreciate it... I was thinking to plan the trip according to the festivals.