What is “Ajisai” あじさい – Hydrangea?

When Tokyo’s cherry blossoms fade by April and the vibrant rapeseed fields give way in May, a new floral star takes the spotlight: the hydrangea, or “Ajisai” (あじさい) in Japanese. This captivating bloom, often described as a “purple-sun-flower,” thrives during Japan’s rainy season in June, transforming gardens, temples, and parks into magical havens of color.

Hydrangeas hold a special place in Japanese culture, much like sakura (cherry blossoms) and ume (plum blossoms). With their origins in Japan, these flowers have been celebrated for centuries as a symbol of gratitude and heartfelt emotion. Their lush, globe-shaped clusters – ranging in shades from soft lilacs and dreamy blues to vivid purples – are particularly mesmerizing when kissed by early morning raindrops, making them a true hallmark of the season.

What sets Japanese hydrangeas apart is their unique hues of blue, which are rare and strikingly beautiful compared to hydrangeas found elsewhere in the world. These blooms are lovingly cultivated not just in serene temple grounds and manicured gardens but also along roadside paths and urban parks. During peak bloom from late May to June, these spots become popular destinations for locals and travelers alike.

For an unforgettable hydrangea experience, visit Tokyo’s gardens or venture to Kamakura, where you’ll find these flowers adorning ancient temples and winding pathways. Whether you’re strolling under an umbrella or capturing the morning dew on petals, hydrangea viewing in Tokyo is a spellbinding experience you won’t want to miss.

For a day trip from Tokyo: How to Plan a Perfect Summer Day Trip to Kamakura and See Hydrangea

What are the colors and shapes of hydrangeas?

Interestingly, there is no definite answer. Hydrangea color varies, even the flower blooms are grown from the same stock. This is because the color of the flower depends on the acidity and the amount of aluminum in the soil. Anthocyanin is the pigment of hydrangea and the spectrum covers from shades of blue to purple. The amount of pigment depends on the amount of aluminum in the soil. When the soil is alkaline, the blooms become pink; when the soil is acidic, the blooms become blue.

Aging also determines the color of the flower. The flower may look green on a young bush and it changes color as the chlorophyll degrades as it gets older.

What types of hydrangeas are commonly seen in Japan?

The most commonly seen hydrangea is “Hon-ajisai”, or the French hydrangeas, mopheads, or hortensias, this is the common “western hydrangea” and was imported from foreign countries.

Mophead has a full body with a wide range of colors from white, pink, blue, and purple to red. The large flower bloom has small flowers evenly distributed throughout.

It is also good for cutting flowers as you see them at the florist. Click on the photos above and find out the other types of Hydrangea.

Lacecap hydrangea is a unique type of hydrangea that can be easily recognized. It is shaped like the mopheads and the tiny flower buds in the center, with the big flowers that circle the edge of the flower head. Try to look for them when you are viewing the flowers in the gardens!

Panicle Hydrangea is known for its long panicles from which its large flowers bloom. Their cone-shaped panicles can range from six to 18 inches long, as opposed to the bulb-shaped flower heads of other hydrangeas.

Try to look for them when you are viewing the flowers in the gardens!

Where are the best places to view hydrangeas in the Tokyo area?

Summer is once again coming to the north side of the earth and I saw a beautiful orange Hydrangea blooming near my home in the morning when I headed off to work.

Hakusan-Jinja Shrine

To celebrate the blooming season visitors do not have to go far. Close to The University of Tokyo, both Hakusan Shrine and Ueno Park are great places to view hydrangea when they are in season.

Hakusan-Jinja Shrine is located in Bunkyo city, a charming, old-fashioned neighborhood known for its rich culture and beautiful flowers – the city holds five major flower festivals annually, and the hydrangea Festival (Ajisai Matsuri) is one of them. The event starts on June 8th 2019 and there are over 3,000 hydrangeas around Hakusan-Jinja Shrine and Hakusan Park. Visitors come here to enjoy viewing and photo-shooting, and there are a number of street stalls selling potted hydrangeas and other festive items during the festival.

Ueno Onshi Park

Another great place is Ueno Onshi Park. It is a well-known spot for cherry blossoms, and also hydrangea. The park covers 530,000 sqm with a lot of cultural and recreation facilities, including the Tokyo Metropolitan Art Museum, Tokyo Bunka Kaikan, National Museum of Western Art, National Museum of Nature and Science, Tokyo National Museum, Ueno Zoo, and so on.

Hydrangea is grown on the sidewalks of numerous trails in the parks. In other words, hydrangeas are basically everywhere. Enjoy viewing hydrangea while exploring the many places in the area!

Most Popular Hydrangea Viewing Spots

Hakusan-Jinja Shrine

Known as Tokyo’s hydrangea paradise, this shrine hosts the annual Bunkyo Hydrangea Festival every June. With over 3,000 hydrangea bushes blanketing the grounds, this is one of the city’s most beloved spots for hydrangea viewing. The vibrant blooms contrast beautifully with the traditional Shinto shrine architecture, creating picture-perfect scenes. Arrive early to beat the crowds, and explore the small food stalls set up during the festival. Take the Tokyo Metro Namboku Line to Hakusan Station for easy access.

Jindai Botanical Gardens

Home to over 10,000 hydrangea plants across 300 species, Jindai Botanical Gardens offers one of Tokyo’s most extensive collections. The dedicated hydrangea garden is a must-see, and the park’s sprawling grounds provide plenty of space to explore. Combine your visit with a trip to the nearby Jindaiji Temple for a tranquil day out. From Chofu Station, take a bus to the gardens.

Showa Kinen Park

This sprawling park in Tachikawa is a family-friendly destination featuring over 9,000 hydrangea plants. The park’s hydrangea walkways are beautifully landscaped, making it a favorite spot for nature lovers and photographers. Rent a bike to explore the vast grounds or enjoy a picnic under the trees. Access is convenient via Nishi-Tachikawa Station on the JR Ome Line.

Hidden Gems for Hydrangea Viewing

Keiō-Mogusaen

This lesser-known garden is a serene escape for hydrangea enthusiasts. The park’s terraced layout allows visitors to enjoy panoramic views of hydrangea blooms against a lush natural backdrop. Its peaceful atmosphere makes it perfect for those seeking a quieter experience. From Mogusaen Station on the Keio Line, it’s a short walk to the garden.

Kyu-Iwasaki-tei Gardens

This historic Western-style mansion is surrounded by a beautiful garden featuring hydrangeas. The contrast between the building’s 19th-century architecture and the colorful blooms makes it a unique spot for hydrangea viewing. It’s conveniently located near Ueno, making it an easy addition to your Tokyo itinerary. Take the JR Yamanote Line to Ueno Station and walk to the gardens.

Yakushiike Park

Located in Machida, this spacious park feels like a hidden treasure. The peaceful setting includes a pond surrounded by hydrangea blooms, making it ideal for a leisurely stroll or quiet reflection. This spot is less crowded, even during peak season. Reach the park via bus from Machida Station.

Other Noteworthy Locations

• Asukayama Park: Known for its cherry blossoms, this park also boasts lovely hydrangea displays. Located near Oji Station, it’s a convenient and relaxing spot to enjoy the blooms.
• Hamarikyu Gardens: While more famous for its landscaped beauty, this historic garden also features some hydrangeas. Pair your visit with a traditional tea ceremony in the teahouse for a cultural experience.
• The East Gardens of the Imperial Palace: A historic and tranquil spot with hydrangeas scattered throughout. Ideal for a mid-day escape, accessible via Tokyo Station.
• Sumida Park: Located along the Sumida River, this park offers hydrangea viewing with views of Tokyo Skytree in the background. A charming urban experience close to Asakusa.
• Toneri Park: Featuring hydrangeas alongside wide open spaces, this park is perfect for families and picnics. Accessible from Toneri-kōen Station on the Nippori-Toneri Liner.