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
Special Weekend Events
5/10(日) 浅間高原野鳥の会合同観察会
9：30分受付開始・10：00スタート
※当日受付のみ
5/16(土)
・盆栽作り体験 限定50鉢！
＜時間＞10:30ごろ～14:00ごろ（予定）
＜参加費＞500円
予約なし。当日現地にて参加できます。
※在庫無くなり次第終了となります。
・ジオガイドによる園内フリーガイド
5/17(日)
いっしょに撮り歩くシャクナゲ園撮影会（講師：萩原れいこ先生）
午前：カメラの部／午後：スマホの部
※予約制
5/23(土)・24(日)・30(土)・31(日)
ジオガイドによる園内フリーガイド
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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.
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