Tachikawa's Showa Kinen Park has the most impressive fields of cosmos flowers in the capital and this is the ideal time to see them all in full bloom. The hilly grasslands of the park are usually draped in colour from the middle of September with various types of cosmos flowers, and the multicoloured scenery can be enjoyed well into October.
There are four main gardens: The Lemon Bright field, which is covered in vivid yellow sulfur cosmos; Fall Bouquet Garden, which has a mixture of 20 different cosmos; the Akatsuki and Hinomaru cosmos field; and the Cosmos Sensation filled with lilac blooms. Treat yourself with some citrusy lemon soft-serve ice cream or a non-alcoholic lemon bright mojito.