March to May and September to November with pleasant temperatures are the best time to visit Tokyo. Spring will fascinate you with cherry blossoms and blooming wisteria tunnels. You might want to avoid Golden Week when residents travel in and out of the city. Visiting Tokyo in the middle of autumn means tasting all kinds of Japanese fruits like kaki, yuzu or nashi pears and being petrified by fantastic autumn foliage. June to September is a peak tourist season with longer lines and torturing heat accompanied by humidity. Lounging on the beach or climbing Mount Fuji sounds like a good summer experience. Winter in Tokyo can be chilly but mainly tolerable. December through February period gives you a chance to try exotic Japanese inago or zazamushi. The prices in Tokyo are high throughout a year, so there might be no seasonal deals.