Three weeks ago we moved into a brand new building. I was lucky and was placed in the 11th floor where we have some fabulous views of Mount Fuji, making dusks a joyful experience. This is the time of the year with the best visibility to see Mount Fuji from Tokyo (October, November, December, January and February). In spring and summer it is quite difficult to see Mount Fuji due to the mist of dampness and pollution that is practically permanent in the sky of Tokyo. But sometimes you can be lucky enough and even be able to spot it in August and September, specially the days after a typhoon has passed by (they help to clean the air).
Crazy clouds!