Definitely one of the best places to enjoy red leaves in Wakayama – Koyasan. You can enjoy autumn red leaves all around this sacred place.
To fully enjoy your trip to Koyasan, you would definitely want to go to Kongobuji, watch the Konpon Daito and have sesame tofu with the Buddhist vegetarian meal. After that, take a walk to Okunoin. The crimson architecture of the temples and the leaves make a great sight full of red. The warm color toned scenery shall burn up your heart too.
One of the best places to enjoy the red leaves is “Jyabaramichi”. Jyabaramichi is the name of the small road from the entrance of Kongobuji to the Danjyo Garan (East tower). Red leaves are planted from both sides on this road, and it seems to be like a natural tunnel of red leaves.

Kongouji is one of the best places to go out for red leaves in Kawachinagano city, a city of Japanese heritage. Kongouji itself is one of the three Japanese heritages in Kawachinagano city and is full of history. It is known as “Nyonin Koya (Koya for women)” since it was a place that women in ancient times went to pray for Kobo Daishi, the saint of Koya.
The autumn scenery of the autumn leaves at the Karesansui garden (Japanese dry landscape garden) is wonderful, and you must feel the traditional beauty of Japan.

Kanshinji is said to be founded in 701, and Kobo Daishi Kukai has named it. The Kondo, which is the national treasure of Japan, is the oldest architecture of a national treasure as the main building of a temple. At the season of red leaves, the temple will be full of maple and ginkgo leaves, and you can enjoy a spectacular view.

Ushitakisan, a mountain located in Kishiwada, Osaka, has many beautiful spots to see - a tower that is a national important cultural property, Daiitokuji, and a magnificent waterfall. The sight of the photo (lit. many-jeweled pagoda ) and the red leaves inside Daiitokuji are wonderful. Ushitakisan is said to be the best spot to see red leaves in Osaka. "Ushitakisan Momiji (red leaves) Festival" is held every November. Please take a look!

Daisen Koen is a park 380,000 ㎡ large in Sakai city, full of greenery and history nearby to the only UNESCO world heritage site in Osaka, the burial mound of Emperor Nintoku. You may enjoy the beautiful scenery that resembles "Mount Lushan" from the Jianxi province in China. This park is designated as one of Japan's Top 100 Historical Parks. Inside the park, there are also tea-ceremony rooms and Japanese traditional gardens. Daisen Koen is illuminated in the season of red leaves, so you may enjoy wondrous scenery.

Enmeiji is the main sight for red leaves that are selected as the best sceneries in Kawachinagano city. Especially, the large maple tree that is said to be more than 1000 years old is called "Yubae Momiji (Red leaves glowing by the sunset)", since the sight of the tree during sunset time is wonderful. It is also designated as a natural treasure of Osaka.

How about taking a short trip to Wakayama city? Just an hour trip from Osaka, Namba, Wakayama city is a nice place to spend your weekend.
After a ten minute walk from Wakayama city station, you will arrive at Wakayama castle. There are many ways to enjoy this castle.
Especially in the autumn season, red leaves from the Japanese Garden of Wakayama castle is great. The gardens name is Momigidani Teien (The garden of the valley of red leaves, in other names "Nishinomaru Garden").
It is on the slope of the mountain of Wakayama castle, and a lake that connects to the moat lays here. The autumn leaves reflect on this lake with “Engyokaku”, a traditional palatial architecture.
Rainy days are actually a sight here – when the smoky surface of the water reflects “Engyokaku”, the beauty of Japan shall move your heart.
(This information is from November 5th, 2020)