Adjacent Hakusan Shrine and Hakusan Park in Bunkyo City are a popular spot where about 3,000 hydrangeas bloom in profusion despite being in the city center. At peak viewing, from early to mid-June each year, the “Bunkyo Hydrangea Festival” is held, and the 富士塚 is specially opened to the public only during the festival period. Just about a 2-minute walk from Hakusan Station, it’s easy to visit and perfect to combine with a stroll around the area.

A Fuchu City landmark where restored historic buildings across the spacious grounds and around 10,000 hydrangea plants create a nostalgic landscape. During the “Kyodo-no-Mori Hydrangea Festival,” there are plenty of events, including exhibitions of potted hydrangeas of various varieties and special tea service in the tea room. The combination of retro streetscapes and vibrant hydrangeas is perfect for photography.

One of the Kanto region’s three great Fudo temples, Takahata Fudoson in Hino City is known in Tokyo as the “Hydrangea Temple.” From the precincts up the hillside, more than 7,800 bushes across about 250 varieties of mountain and Western hydrangeas bloom in profusion, making it one of the capital’s premier spots. The combination of temple architecture such as the five-story pagoda with hydrangeas is exceptionally beautiful and truly impressive. The Hydrangea Festival in June draws large crowds.

“Asuka no Komichi,” a path along the railway right by JR Oji Station, is a popular walkway where about 1,300 hydrangea bushes bloom over roughly 350 m. It is also known as a perfect photo spot where you can capture hydrangeas together with passing trains and the Toden Arakawa Line (Tokyo Sakura Tram). It’s close to the station for easy access and is a famous spot to enjoy along with a stroll in Asukayama Park.

Located on the hills along the Tama River, Tamagawadai Park features a splendid Hydrangea Garden with about 7 varieties and 3,000 plants in bloom. There are many highlights such as ancient burial mounds and a lookout deck, allowing you to enjoy a leisurely stroll in a rich natural setting. Compared with other hydrangea spots in Tokyo, it is relatively easy to avoid crowds here, making it a recommended hidden gem.

A historic garden known since the Edo period for Japanese irises, also depicted in ukiyo-e by Utagawa Hiroshige. Around 200 varieties and 6,000 clumps of Edo irises bloom in profusion, offering beautiful scenery full of old-town charm. During the “Katsushika Shobu Festival” in June, the peak viewing season, opening hours are extended, making this one of Tokyo’s leading iris spots visited by many tourists.

The largest waterside park in Tokyo, featuring a vast iris garden where about 100 varieties and 14,000 clumps of Japanese irises are in full bloom. Together with Horikiri Shobuen, it serves as a venue for the “Katsushika Shobu Festival,” and its biggest attraction is that you can enjoy irises and hydrangeas at the same time amid open waterside scenery. An ideal spot for early-summer strolls and picnics.

At Koiwa Iris Garden, which spreads across the Edogawa riverbed, about 100 varieties and 50,000 Japanese irises bloom in profusion. The expansive sky unique to the riverbank and the vivid contrast of the irises are beautiful, making for a liberating stroll. During the peak season, the 「小岩菖蒲園まつり」 is held, and this famous spot in Edogawa City bustles with many visitors.

This park in Adachi boasts unbeatable access—it's right in front of Kita-Ayase Station. About 140 varieties and 8,100 clumps of Japanese irises are planted, and you can admire the flowers up close from the wooden boardwalks in the park. Being so close to the station, it's easy to drop by and is a particularly recommended hidden gem among Tokyo's iris spots.

Home to a historic iris garden said to have been planted by Emperor Meiji for Empress Shōken, where around 150 varieties and 1,500 clumps of Japanese irises bloom in profusion. The iris garden, nourished by the pure spring water of 清正井（きよまさのいど）, is filled with tranquility and refinement that make you forget the city's bustle. It also has convenient access from Harajuku Station and is a precious spot to experience nature in the heart of the city.

A feudal lord’s garden associated with the Mito Tokugawa family, created in the early Edo period. In early summer, about 660 clumps of Japanese irises bloom in the “iris field,” creating a charming rural landscape. During the event period, a wooden boardwalk is set up beside the iris field so you can enjoy the flowers up close. A recommended spot where you can enjoy both history and nature in the city center.

At Kiyosumi Gardens, a representative Meiji-era strolling pond garden, clusters of Edo-type Japanese irises color the waterside in early summer. The harmony between the beautiful Japanese garden, adorned with famous stones, and the dignely blooming irises is splendid. It’s easily accessible from Kiyosumi-shirakawa Station, and it’s a great spot for a stroll combined with visits to stylish cafes nearby.