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Niji no Hiroba (Arakawa Riverbed)

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Niji no Hiroba (Arakawa Riverbed)

A riverside flower garden where seasonal blooms create a vibrant rainbow of colors along the Arakawa River.

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Supervised by :  Adachi-ku

Located along the open and spacious Arakawa riverbed-popular for walking and cycling-the Niji no Hiroba (Rainbow Plaza) is a beloved relaxation spot for residents of Adachi City. Nestled between two baseball fields, the plaza features eight arch-shaped flowerbeds where visitors can enjoy seasonal blooms. There is no parking area, so the best access is on foot from Kita-Senju Station.

In spring, around 14,000 tulips and pansies burst into color, delighting visitors with their vivid beauty. The tulips are planted in seven colors, matching the bricks laid between the flowerbeds. When viewed from the top of the embankment at full bloom, the scene resembles a large, vibrant rainbow. In summer, the garden comes alive with canna lilies, marigolds, and other seasonal flowers.

The Arakawa riverbed is also the site of the Adachi Fireworks Festival, where about 13,000 fireworks light up the night sky, attracting over 600,000 spectators each year. Slightly away from the main venue, Niji no Hiroba serves as a lesser-known but excellent free viewing spot. In autumn, the plaza transforms again as it becomes one of the venues for the Adachi Citizens’ Festival, which features stage performances, stamp rallies, and other fun events.

Highlights

  • A riverside plaza located along the Arakawa River.
  • Enjoy seasonal flowers such as tulips and pansies in spring, and cannas and marigolds in summer.
  • A popular viewing spot for the Adachi Fireworks Festival in summer.
  • Also known as a venue for the Adachi Citizens’ Festival held every autumn.
  • About a 15-minute walk from Kita-Senju Station.

Photos

  • A popular photo spot in spring where visitors can enjoy the beauty of seasonal blooms.

    A popular photo spot in spring where visitors can enjoy the beauty of seasonal blooms.

  • Around 14,000 tulips and pansies create a breathtaking sea of color in full bloom.

    Around 14,000 tulips and pansies create a breathtaking sea of color in full bloom.

Official FAQs

Frequently Asked Questions have been vetted and answered directly by each listing.

Q

Do you have signs or pamphlets in foreign languages? (If you do, which languages are available?)
A

Sorry, we don’t.

Q

Is free Wi-Fi available in the area?
A

No free Wi-Fi available.

Q

Are there restrooms available?
A

Yes. Facilities include one men’s toilet (1 stall, 2 urinals), one women’s toilet, and one accessible toilet.

Q

Is there a smoking area?
A

No. Smoking is prohibited throughout the entire plaza.

Q

Are there any sightseeing spots nearby?
A

Yes. You can explore the Senju-juku area, known for spots like Yarikake Dango and the historic Yokoyama Residence.

Reviews

1

Some reviews are AI-translated.

  • BobbyJenny
    See More

    During cherry blossom season, the most relaxing thing to do along the Arakawa River is find a spot under a cherry tree and have a picnic. I didn’t plan anything in particular—just brought some food and drinks I liked, found a place to sit, and took my time eating and enjoying the blossoms. It actually felt especially leisurely.

    Sitting on the grass, all you see when you look up are cherry blossoms. When a light breeze blows, the petals gently drift down. Nearby, you can also see many local residents enjoying the blossoms and chatting with their families. The whole atmosphere really feels like spring in Japan.

    I ate my picnic while looking at the riverbank scenery, occasionally taking out my phone to snap a few photos of the cherry blossoms, blue sky, and Arakawa River together. Without the crowds of a popular tourist attraction, it was easier to take my time and enjoy the cherry blossoms.

Details

Name in Japanese
虹の広場（荒川河川敷）
Postal Code
120-0034
Address
5-chome Chisaki, Senju, Adachi-ku, Tokyo
Telephone
03-3880-5898 (Adachi Ward Park Maintenance Division, Arakawa Section)
Closed
Free to walk
Business Hours
Walk anytime
Admission
Free
Access
About 15 minutes walk from Any Line’s Kita-Senju Station.
Official Website
Official Website (Japanese)
Hokkaido Tohoku Kanto Chubu Hokuriku Kansai Chugoku Shikoku Kyushu Okinawa