Marunouchi Area Becomes a Summer Playground and Learning Space for the Entire Town with the First "MARUNOUCHI SUMMER FEST"

The MARUNOUCHI SUMMER FEST Executive Committee (comprising the Otemachi, Marunouchi, Yurakucho Area Management Association, Regale Otemachi-Marunouchi-Yurakucho, Ecocozzeria Association, and Mitsubishi Estate Co., Ltd.) will hold the "MARUNOUCHI SUMMER FEST" for the first time from July 24 (Fri) to August 23 (Sun), 2026, at various locations in the Otemachi, Marunouchi, and Yurakucho area (hereinafter referred to as the Marunouchi area). This event is designed for everyone from children to adults to enjoy the entire town as a summer playground and learning space, featuring over 100 diverse experiential content.

* Official Website: https://www.marunouchi.com/lp/marunouchisummerfest2026/

A "Flower Corridor" to Decorate Marunouchi Naka-dori Street Coolly

(From left) Marunouchi Building (at the time), Block 1 (Mitsubishi Corporation Building, Yusen Building, Marunouchi Building) concept image - Day / concept image - Night

Exclusive Benefits for Marunouchi Workers! Special Discounts Available at Various Events

- Event Period:

July 24 (Fri) to August 23 (Sun), 2026 (31 days total)

- Participating Stores:

▷ Marunouchi Happ. Stand & Gallery (1F, Marunouchi 2-chome Building)

Eligible Menu Items: Draft Beer, Blue Citrus Soda (Non-alcoholic)

▷ GARB Cheers OTEMACHI (1F, Otemachi Financial City South Tower *Closed on Saturdays and Sundays)

Eligible Menu Items: Draft Beer, Cheers Blue (Cocktail), Soft Drinks

- How to Participate:

Present your coupon screen from the worker's site "MARUNOUCHI WORKERS" at the store.

MARUNOUCHI WORKERS: https://www.marunouchi-workers-portal.com/

* Coupon Distribution Period:

1 July 24 (Fri) - July 30 (Thu), 2 July 31 (Fri) - August 6 (Thu), 3 August 7 (Fri) - August 13 (Thu), 4 August 14 (Fri) - August 23 (Sun)

* Drink gifts can be redeemed one per person per coupon distributed for each period at either "Marunouchi Happ. Stand & Gallery" or "GARB Cheers OTEMACHI." Alcohol will only be served to individuals aged 20 and over.

[Benefit II] Special Discounts for Workers at Marunouchi's Annual Summer Events

Exclusive participation benefits and special slots will be offered to workers at Marunouchi's regular events such as "Marunouchi Street Park 2026 Summer," "Marunouchi Bon Odori 2026," and "Otemachi Ennichi 2026," as well as other collaborative initiatives held in the area.

[Limited-Time Summer Menus for Everyone to Enjoy]

* Available for order by non-members of "MARUNOUCHI WORKERS" as well.

"Happ." will also feature original shaved ice menu items that evoke the feeling of summer for a limited time. Using rare natural ice from "Yondaime Tokujiro," meticulously crafted by artisans in Nikko, the ice is frozen slowly over time to achieve a fluffy, cotton-snow-like texture that melts instantly in your mouth.

- Shaved Ice Menu: ¥1,485 each (tax included)

▷ Yondaime Tokujiro's Tochiai Strawberry Syrup

▷ Yondaime Tokujiro's Blueberry Syrup

▷ Matcha Syrup using Ippodo Tea's Matcha

▷ Homemade Green Plum Syrup

Matcha Syrup using Ippodo Tea's Matcha Yondaime Tokujiro's Tochiai Strawberry Syrup

"MARUNOUCHI SUMMER FEST" Event Overview

Name:

MARUNOUCHI SUMMER FEST

Period:

July 24 (Fri) - August 23 (Sun), 2026

Location:

Various locations in the Marunouchi area

Organizer:

MARUNOUCHI SUMMER FEST Executive Committee

(Comprising: Otemachi, Marunouchi, Yurakucho Area Management Association, Regale Otemachi-Marunouchi-Yurakucho, Ecocozzeria Association, Mitsubishi Estate Co., Ltd.)

URL:

https://www.marunouchi.com/lp/marunouchisummerfest2026/

First Release:

https://www.mec.co.jp/event_campaign/mec260602_msf/mec260602_msf_2.pdf

* The event period, dates, and times may vary for each event, and some may be held outside the above period. Not all workshops and events will be held during the entire period.

* Event details are subject to change.

1 Marunouchi Summer Mission

A stamp rally event, "Marunouchi Summer Mission," designed to enhance enjoyment of Marunouchi in the summer, will be held concurrently via the Marunouchi Point app. By scanning QR codes at select events, workshops, and various spots around town, participants can earn stamps. Accumulating stamps allows participants to share a total of 1 million Marunouchi Points based on the number of stamps collected, and one lucky winner will receive 100,000 points via lottery from those who achieve 10 stamps. Details will be announced on the Marunouchi Point app in late July. * Participants will earn one lottery entry for the 1 million point share for every 3, 5, and 10 stamps achieved. The points per entry may be small depending on participation.

2 Marunouchi Summer Workshop

- Over 50 Companies in the Marunouchi Area Collaborate! Seeking Participants for Workshops Enjoyable for Children and Adults -

In collaboration with over 50 stores and companies in the Marunouchi area, "Marunouchi Summer Workshop" will be held, focusing on "work experience" opportunities for children and families. Some programs will be available on-site without prior reservation during the event period. A detailed list of each event and workshop can be found on the official "MARUNOUCHI SUMMER FEST" website.

"MARUNOUCHI SUMMER FEST" Official Website: https://www.marunouchi.com/lp/marunouchisummerfest2026/

3 Marunouchi Street Park 2026 Summer

Period: July 24 (Fri) - August 23 (Sun), 2026

Location: Marunouchi Naka-dori Street

Organizer: Marunouchi Street Park 2026 Executive Committee

Content: "Marunouchi Street Park" is a social experiment exploring the future utilization of Marunouchi Naka-dori Street. This summer, under the theme "Playful Chill Street -Cooling Day/Neon Night-," the focus is on creating a comfortable environment even in extreme heat, incorporating elements such as mist, shade, wind, sound, and scent. Furthermore, by creating different atmospheres during the day and night, efforts will be made to foster nighttime vibrancy, providing an environment where Marunouchi area workers can relax after work.

Official Website: https://marunouchi-streetpark.com/

4 Imperial Palace Outer Garden: Japanese Lantern Path

Period: July 24 (Fri) - July 25 (Sat), 2026, 11:00 AM - 9:00 PM daily *Canceled in case of rain

Location: Kokyo Gaien, Wadakura Fountain Park

Organizer: Regale Otemachi-Marunouchi-Yurakucho

Content: Japanese umbrellas will be exhibited at Wadakura Fountain Park, creating an attractive landscape, especially with nighttime illumination, while also promoting Japanese culture. *Japanese umbrellas will be illuminated after sunset.

Homepage: https://www.marunouchi.com/pickup/event/10210/

5 Marunouchi Bon Odori 2026

Period: July 24 (Fri), 2026, 4:00 PM - 10:30 PM

Location: Gyoko-dori Street

Organizer: Otemachi, Marunouchi, Yurakucho Summer Festival Executive Committee

Content: A festival stage will be set up with the Tokyo Station Marunouchi Building as a backdrop. Performers from the "Bon Odori Morage-tai" (Bon Odori Excitement Squad) composed of people working in surrounding office buildings will join visitors to liven up the venue with bon odori dances to the sounds of taiko drums and traditional Japanese music, as well as J-POP. Additionally, within the venue, there will be a "uchimizu" (water sprinkling) experience booth, promoted by the Ministry of the Environment and the Tokyo Metropolitan Government for heat countermeasures, and parasol rentals.

Homepage: https://www.marunouchi.com/pickup/event/9833/

6 [Mitsubishi Ichigokan Museum, Tokyo] Artists Gathering at the "Café" - From Impressionism to Van Gogh, Toulouse-Lautrec, Picasso

Various initiatives will be implemented as destinations for this summer's outings during the "MARUNOUCHI SUMMER FEST" period.

Homepage: https://mimt.jp/ex_sp/cafe/event/

<Costume Event "For the Serious and the First-Timers: Let's Meet in Marunouchi ~In the Style of 19th Century Paris~">

Date and Time: July 25 (Sat), 2026, 3:00 PM - 8:00 PM

Content: Inspired by the <Café des Effets d'Art> which existed in 19th century Paris and was popular for its costume events, a one-day costume event will be held. The theme is "19th Century Paris." Enjoy an experience immersing yourself in the world of the exhibition with your own unique fashion.

<Enjoying the Museum on a Summer Night. Late-Night Opening (until 8:00 PM)>

Date and Time: July 24 (Fri), 25 (Sat), 31 (Fri), August 7 (Fri), 12 (Wed), 14 (Fri), 21 (Fri), 2026

Content: During the extended evening hours, special musical performances will be held in select exhibition rooms, along with the introduction of episodes related to "cafés" for a more mature audience.

<Mini-Concert with Phonograph and SP Records>

Date and Time: August 7 (Fri), 14 (Fri), 21 (Fri), 2026, approximately 6:30 PM - 6:50 PM each day

Content: As part of the demonstration project "THE WAY OF→," a concert using a phonograph and SP records from the Tokyo University of the Arts Library will be held during the evening opening hours in August.

7 Otemachi, Marunouchi, Yurakucho Eco Kids Adventure 2026

Period: July 27 (Mon) - August 19 (Wed), 2026

Location: Various locations in Marunouchi

Organizer: Otemachi, Marunouchi, Yurakucho Eco Kids Adventure Executive Committee

Content: Targeting the next generation, this event will feature a variety of hands-on workshops in collaboration with companies and stores in the Marunouchi area, promoting sustainable town development. During the summer vacation, it offers opportunities for parents and children to learn and think about the environment and society while having fun.

Homepage: https://ecokids.tokyo/

8 Todai Week @ Marunouchi

Period: July 28 (Tue) - July 29 (Wed), 2026, 6:30 PM - 8:30 PM daily

Location: 3x3Lab Future, DMO Tokyo Marunouchi, Inspired.Lab

Organizer: MEC-U Tokyo Lab

Content: An exchange event where participants can experience and share cutting-edge knowledge from the University of Tokyo by inviting faculty members from various specialized fields to give lectures, participate in cross-talks, and engage in discussions.

Homepage: https://todaiweek-marunouchi.jp/

9 ACT5 Marunouchi / Plogging around Naka-dori 2026

Date and Time: July 29 (Wed), 2026, 5:00 PM - 7:00 PM (Reception starts at 4:45 PM)

Location: Around Marunouchi Naka-dori Street

Organizer: Otemachi, Marunouchi, Yurakucho SDGs ACT5 Executive Committee

Content: Plogging, a combination of jogging and litter picking, is a popular SDGs sport in Europe. In collaboration with Plogging Japan, this event addresses the issue of waste in the Marunouchi area and the well-being of Marunouchi workers.

Homepage: https://act-5.jp/act/2026act3-2/

10 Otemachi Ennichi 2026

Period: July 30 (Thu) - July 31 (Fri), 2026, 5:00 PM - 9:00 PM *Partially canceled in case of rain

Location: Otemachi Naka-dori Street, Otemachi Financial City 1F & 2F, Kawabata Green Road

Organizer: Otemachi, Marunouchi, Yurakucho Summer Festival Executive Committee

Content: In addition to food stalls and takeout menus in collaboration with surrounding restaurants, traditional Japanese festival games such as "flower scooping" and "treasure fishing," offering a refined Japanese atmosphere with the cooperation of "HOSHINOYA Tokyo," a tower ryokan, will be available. A special menu tent booth featuring dishes prepared by the chef of "Sushi Otemon" will also be set up. Furthermore, this year, a new stage content will be the "Singing Contest" by people working in the Marunouchi area.

Homepage: https://www.marunouchi.com/pickup/event/9868/

11 "TOKYO MER The Movie" CAPITAL CRISIS ~Marunouchi Mission~

Period: July 31 (Fri) - September 20 (Sun), 2026 Location: Marunouchi Oazo 1F OO Plaza

Organizer: Mitsubishi Estate Co., Ltd. Content: The entire Marunouchi area, which served as a filming location for "TOKYO MER The Movie: CAPITAL CRISIS," will host a special event to commemorate the movie's release on August 21 (Fri). The event will include a limited-time exhibition of the motorcycle-type ER car (T03) and shopping promotions designed to allow participants to enjoy the town.

Homepage: https://www.marunouchi.com/lp/marunouchi-mission-tokyomer-tieup/

12 LEGO® Festival in Marunouchi 2026

Period: July 31 (Fri) - August 23 (Sun), 2026

Location: Marunouchi Building 1F Marucube and other various locations in the Marunouchi area

Organizer: Mitsubishi Estate Co., Ltd. Content: The LEGO® Festival in Marunouchi, which was popular last year, returns this year with the theme "Play Unites the Town!" It will feature a variety of attractions for children and adults, including a LEGO® pop-up store, 3D model exhibitions, a LEGO® One Piece stamp rally, and a participatory workshop for building LEGO® Botanical Series sets.

Homepage: https://www.marunouchi.com/lp/legofestival2026/

13 Resource Circulation Starting from Compost - The "Grow" Phase of the "Circulate, Grow, Connect PROJECT" Vol. 2

Period: August 4 (Tue), 2026, 12:00 PM - 1:30 PM

Location: 3x3Lab Future

Co-organizers: Otemachi, Marunouchi, Yurakucho SDGs ACT5 Executive Committee, Ecocozzeria Association

Content: Recommended for summer vacation homework! Challenge yourself to grow organic leaf vegetables using nutrient-rich compost.

Homepage: https://act-5.jp/act/2026act2-9/

14 Marunouchi's "Little Creatures" Joint Survey!! Searching for Town Insects that Help Pollinate Flowers ~Summer Edition~

Period: August 5 (Wed), 2026, 7:40 AM - 8:30 AM *Reserve day: August 12 (Wed)

Location: Ichigokan Plaza, Marunouchi Brick Square (Meeting point. Observation will be conducted while walking.)

Organizer: Ecocozzeria Association

Content: Walk through the morning town and observe insects gathering on flowers, taking photos with smartphones for a biodiversity survey. A guide will be provided by an expert, making it accessible for beginners.

Homepage: https://www.ecozzeria.jp/ *Scheduled to be released in early July

15 Marunouchi Summer College 2026

Period: August 12 (Wed) - 14 (Fri), 2026, 10:00 AM - 5:30 PM daily (until 6:00 PM on the final day)

Location: 3x3Lab Future

Organizers: Mitsubishi Estate Co., Ltd., Ecocozzeria Association

Content: A practical learning program for high school and university students, where they consider social issues and careers through lectures by diverse speakers active in society, fieldwork, and interactive workshops, culminating in team-based idea development and presentations.

Homepage: https://www.ecozzeria.jp/events/msc/msc2026.html

16 Daibiru Shizen no Copain: "Peeking" at Small Aquatic Creatures ~Into the Microscopic World with High-Performance Optical Microscopes~

Date: August 18 (Tue), 2026, 1:30 PM - 3:45 PM

Location: 3x3Lab Future

Co-organizers: Tokyo Tatemono Co., Ltd., Mitsui & Co., Ltd., Mitsui Fudosan Co., Ltd., Mitsubishi Estate Co., Ltd., Ecocozzeria Association

Content: Observe various creatures, large and small, living in and around the water at the "Hotoria Plaza," an urban green space, with your family! Search for creatures using self-made tools and peer into the microscopic world with high-performance optical microscopes. Entomologist Mr. Suda, known as a leading researcher of dragonflies, will serve as the instructor, providing a fun and expert-led learning experience about the wonders and charms of aquatic life.

Homepage: https://www.ecozzeria.jp/events/env/copain202608.html

17 TOKYO AfterDark in Marunouchi

Period: Ongoing - August 14 (Fri), 2026

Location: Marunouchi Area

Content: Numerous content options to enjoy Marunouchi at night are available. Night tours of the Marunouchi area, including the Imperial Palace, and special hop-on/hop-off passes for dining establishments in the area will be sold! Mondays in July will feature special DJ booths and photo booths in collaboration with marunouchi house, offering events to fully enjoy the nighttime.

* This project is supported by the Tokyo Metropolitan Government and the Tokyo Convention and Visitors Bureau's "Subsidy for Promoting Tourism during Nighttime (Night/Early Morning) Hours."

Homepage: https://www.marunouchi.com/lp/tokyo-afterdark/

18 BEER TERRACE in (marunouchi)HOUSE 2026

Period: Ongoing - September 30 (Wed), 2026

Location: Marunouchi House, 7F, Shin-Marunouchi Building

Business Hours: Weekdays & Saturdays 11:00 AM - 11:00 PM *Some stores open until 28:00 AM

Sundays & Holidays 11:00 AM - 10:00 PM

Content: The beer terrace is back at Marunouchi House on the 7th floor of the Shin-Marunouchi Building. Located in the heart of the city, this terrace offers a refreshing breeze, allowing you to enjoy a relaxing and special time with a cold beer and pleasant music. In addition to beer, you can also savor authentic cocktails and meticulously prepared restaurant menus from each establishment while enjoying the open and scenic view.

Launch Release: https://www.mec.co.jp/news/detail/2025/05/22_mec2500522_machi

<Inquiries Regarding This Matter from the General Public>

Marunouchi Call Center TEL: 03-5218-5100 (11:00 AM - 9:00 PM)

* However, until 8:00 PM on Sundays and holidays (until 8:00 PM only on the last day of consecutive holidays).