Short-sleeve clothes are also wearable in September in most areas in Japan. For the decreased temperature, you may need to add a thin top or change into a long shirt if feeling cool. Due to typhoons, raincoat, umbrella, rain boots, or more rain gear should be prepared. Even so, it’s optimal to stay indoors if you encounter a typhoon.

The colorful fall foliage can be enjoyed in Hokkaido since mid-late September, the earliest region for autumn leaves in Japan. Maruyama Park, Nakajima Park and Mt. Moiwa in Sapporo, Mt. Hakodate, and Otaru Canal are popular sites for admiring the leaves.

You can also catch the last chance to climb up Mt. Fuji in early September. Even the trails to the summit are closed later, there are multiple places to see the mountain on a clear day at the foot of Mt. Fuji, such as Lake Kawaguchi, Lake Ashi, Akakurayama Sengen Park and Oshino Hakkai.

The Sumo Tournament is an interesting indoor event to watch in Tokyo in September, to learn about this Japanese combat sports. Moreover, many attractions like heritage sites, old temples and shrines, and skyscrapers can be visited all year around.