Hydrangea (Ajisai) Blooming Season and Recommended Spots Across Japan to Brighten the Rainy Season

Hydrangea (Ajisai) is the quintessential flower of Japan's rainy season (Tsuyu), and its appearance, glistening with raindrops, soothes the hearts of onlookers. Its diverse expressions, with colors ranging from blue, purple, pink, and white, changing according to soil acidity, are one of its charms. This article will introduce the 2026 blooming season for hydrangeas, along with carefully selected recommended spots across Japan. Detailed information for each location is also provided, so please use it to plan your hydrangea viewing this year.

1. Basic Information and Diverse Charms of Hydrangea (Ajisai)

Hydrangea is a deciduous shrub native to Japan, cherished by many people since ancient times. Its appeal lies in the vibrant colors that bloom during the rainy season and the unique appearance that varies by cultivar.

Blooming Season and Color Changes

The best time to see hydrangeas is typically from early June to early July. While it may vary slightly depending on the region and elevation, most places reach their peak from mid to late June. In higher elevation areas, you can sometimes enjoy them for longer, until around mid-July.

What appears to be the petals of a hydrangea is actually a modified sepal called a "decorative flower" (sōshokuka). The color of these decorative flowers has the characteristic of changing with the soil's acidity. Generally, if the soil is acidic, the blue hue will be stronger, and if it is alkaline, the red hue will be stronger. Additionally, many varieties gradually change their flower color from the beginning to the end of their bloom, and this transient beauty is also a unique charm of hydrangeas.

Main Types of Hydrangeas

There are several main types of hydrangeas found in Japan. Each has different characteristics, which are key points for appreciation.

2. Hydrangea Spots in Kanto: Colors of Ancient Kamakura and Hakone

The Kanto region boasts numerous hydrangea spots, particularly centered around the historic city of Kamakura. We will introduce temples renowned as "Ajisai-dera" (hydrangea temples) and unique viewing experiences.

Kamakura: Meigetsu-in Temple (Meigetsu-in)

Affectionately known as "Ajisai-dera" (hydrangea temple), Meigetsu-in Temple (Meigetsu-in) is a prominent hydrangea spot representing Kamakura. Approximately 2,500 hydrangea bushes are planted within its grounds, most of which are of the "Hime Ajisai" variety. When in full bloom, the entire temple grounds are dyed in a mystical deep blue known as "Meigetsu-in Blue," captivating visitors.

• Address: 189 Yamanouchi, Kamakura, Kanagawa Prefecture
• Access: Approximately a 10-minute walk from Kita-Kamakura Station (Kita-Kamakura Eki) on the JR Yokosuka Line.
• Visiting Hours: Normally 9:00 AM – 4:00 PM. Extended to 8:30 AM – 5:00 PM in June.
• Admission Fee: 300 JPY (approx. $2) during regular periods. 500 JPY (approx. $3-4) during hydrangea season. The inner garden of the main hall requires an additional 500 JPY (approx. $3-4) (special opening only during iris and autumn foliage seasons).
• Crowd Information: June is extremely crowded. Early morning right after opening (around 8:30 AM – 9:00 AM) or relatively calmer evenings (after 3:00 PM) are recommended.
• Parking: No dedicated parking available. Public transportation is highly recommended.

Kamakura: Hase-dera Temple (Hase-dera)

Known as the "Flower Temple," Hase-dera Temple (Hase-dera) is an ancient temple where you can enjoy seasonal flowers throughout the year, but the hydrangeas in June are particularly spectacular. Approximately 40 varieties and 2,500 hydrangea bushes grow in clusters along the walking path on the slopes of Kannon-yama (Kannon Mountain), with colorful flowers blooming profusely. From the observation deck along the path, you can enjoy panoramic views of Kamakura's cityscape and Yuigahama Beach (Yuigahama) over the hydrangeas, making it a popular photo spot.

• Address: 3-11-2 Hase, Kamakura, Kanagawa Prefecture
• Access: Approximately a 5-minute walk from Hase Station (Hase Eki) on the Enoshima Electric Railway (Enoshima Dentetsu). Alternatively, take the Enoden Bus from JR Kamakura Station (Kamakura Eki) to the "Hase Kannon" bus stop and walk for about 5 minutes.
• Visiting Hours: Normally 8:00 AM – 4:30 PM (gates close at 5:00 PM). Extended to 8:00 AM – 5:00 PM (gates close at 5:30 PM) from April to June.
• Admission Fee: Adults 400 JPY (approx. $3), elementary school students 200 JPY (approx. $1-2).
• Crowd Information: Hydrangea season is very crowded, and entry to the walking path may be regulated. Early morning visits are recommended for a more relaxed viewing experience.
• Parking: Paid parking available for 30 regular cars (350 JPY / 30 min, approx. $2-3) and 4 buses (1,000 JPY / 30 min, approx. $7).

Hakone Tozan Railway (Hakone