Asama Rhododendron Festival
Set in the peaceful highlands of Tsumagoi Village, the Asama Rhododendron Garden offers a beautiful seasonal escape surrounded by wide-open farmland and mountain scenery.
Each year from early to late May, the garden fills with blooming rhododendrons, bringing soft color and a sense of early summer to the landscape.
Visitors can enjoy the area at their own pace along simple walking paths, making it an easy stop for anyone looking to spend a little time in nature.
The flowers begin just a short walk from the parking area, so you can take in the views and blossoms without needing to hike far.
The 23rd Asama Rhododendron Festival Event Overview
Dates May 8 – May 31, 2026
Please note that the closing date may change depending on blooming conditions.
Hours 9:30 AM- (Last admission: 3:30 PM)
Location Asama Rhododendron Garden
Parking 100 spaces available
Due to narrow access roads, vehicles longer than 9 meters are not permitted.
Facilities Portable toilets available
Fee ¥300
Free for elementary school children and Tsumagoi Village resident
The garden is open for walking and sightseeing outside of the event period.
→ View the garden map here
Stay Updated
For the latest blooming updates, we recommend adding the official Asama Rhododendron Garden LINE account.
→ Add us on LINE here
Special Weekend Events
Sunday, May 10
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Joint Birdwatching Event with the Asama Kogen Wild Bird Society
Registration starts at 9:30 AM / Event begins at 10:00 AM
Saturday, May 16
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Bonsai workshop at the Geo café
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Guided garden walk with a certified geo guide
Sunday, May 17
-
Rhododendron photography walk
Join the instructor Ms.Reiko Hagiwara for a guided photo tour of the garden
Saturday, May 23, Sunday, May 24, Saturday, May 30, Sunday, May 31
-
Guided garden walk with a certified geo guides
Access
Asama Kogen Rhododendron Garden
Address Asama Kogen Rhododendron Garden, Tsumagoi Village, Agatsuma District, Gunma 377-1524, Japan
Access
▶︎ About 70 minutes from Usui / Karuizawa IC
▶︎ About 60 minutes from Ueda / Sugadaira IC
▶︎ About 110 minutes from Shibukawa / Ikaho IC
If your GPS cannot locate the garden, please use the signboards shown on the map below.
For safety reasons, some roads are one-way during the Asama Rhododendron Festival.
Thank you for your cooperation.
