Otemachi Mitsui Hall is a multipurpose event hall (Otemachi Mitsui Conference) operated within the Mitsui Fudosan group, located in Tokyo’s financial district of Otemachi. Set on the 3rd floor of Otemachi One with a direct connection to Otemachi Station — a hub served by five subway lines — it allows guests to reach the venue entrance from underground without stepping outside in the rain, making it a highly convenient base for business events involving international guests, from lectures and exhibitions to receptions.
The hall’s defining feature is its flexible flat-floor (no fixed seating) configuration. It accommodates up to 638 in theater style and up to 480 in school style, yet with the chairs cleared it can be used as a 190-tsubo flat floor. Combined with the adjacent 380 m² foyer (7 m high), the space can be arranged for exhibitions, product launches, and standing receptions all in one venue. A 7-meter glass wall brings a sense of openness, making this a central-Tokyo venue that adapts to virtually any format, from lectures and ceremonies to networking.
This guide covers practical information including how to get to Otemachi Mitsui Hall, where to stay, dining options nearby, and tips for your visit.
Getting to Otemachi Mitsui Hall
Otemachi Mitsui Hall connects directly to Otemachi Station — served by five subway lines — and is also accessible via a roughly 12-minute walk along underground passages from JR Tokyo Station’s Marunouchi Central Exit. Routes from both Narita and Haneda airports are well established, and using the underground network lets guests reach the venue without exposure to rain — a real advantage when escorting international visitors.
From Narita Airport
- JR Narita Express (N’EX) + walk: Narita Express from Narita Airport Station to JR Tokyo Station (approximately 60 minutes), then an underground walk via the Marunouchi Central Exit toward Otemachi to Otemachi One. Total journey approximately 75 minutes, fare around JPY 3,070. The underground route lets guests with heavy luggage avoid going outdoors.
- Taxi: Narita Airport via the Bayshore Expressway and Inner Circular Route to the Otemachi exit. Journey time approximately 70 minutes, fare around JPY 30,000–35,000. A practical option for group transfers or late-night arrivals. Travel time varies with expressway traffic.
From Haneda Airport
- Tokyo Monorail + JR Yamanote Line: Haneda Airport → Hamamatsucho → Tokyo Station, then underground walk to Otemachi. Total approximately 45 minutes, fare around JPY 700. The standard cost-effective route, and the default choice for most business travelers.
- Taxi: Haneda Airport via the Metropolitan Expressway Route 1 Haneda to the Otemachi exit. Journey time approximately 35 minutes, fare around JPY 7,000–10,000. No transfers required — convenient for guests with heavy luggage or late-night arrivals.
From Nearby Train Stations 🚶
- Otemachi Station (Tokyo Metro Chiyoda, Hanzomon, Marunouchi, Tozai Lines / Toei Mita Line): Direct connection. Approximately 2 minutes on foot from the Chiyoda Line, 3 minutes from the Hanzomon Line, 5 minutes from the Marunouchi Line, and 9 minutes from the Tozai Line. With direct access to a station served by five subway lines, guests can reach the venue from underground without getting wet in the rain.
- Takebashi Station (Tokyo Metro Tozai Line): Approximately 5 minutes on foot. A convenient route for guests arriving on foot from the Imperial Palace or Kitanomaru areas.
- JR Tokyo Station, Marunouchi Central Exit (all JR lines and Shinkansen): Approximately 12 minutes on foot via a direct underground passage. Suitable for Shinkansen arrivals and for guests transferring from other Marunouchi-area facilities.
Venue Quick Reference
| Item | Detail |
|---|---|
| Full Name | Otemachi Mitsui Hall (Otemachi Mitsui Conference) |
| Address | Otemachi One 3F, 1-2-1 Otemachi, Chiyoda-ku, Tokyo 100-0004 |
| Nearest Station | Otemachi Station, direct (Chiyoda Line, approx. 2-min walk) |
| Official Website | otemachi-hall.jp |
| Opening Hours | Varies by event (please check the official website) |
| Inquiries | Via the official website |
Event Venues at Otemachi Mitsui Hall
Otemachi Mitsui Hall is a flexible flat-floor (no fixed seating) hall spread across the 3rd floor of Otemachi One. Because it has no fixed seats, a single space can switch formats — from a theater layout for lectures, to flat-floor use for exhibitions and product launches, to standing receptions. Its ability to be combined with the adjacent foyer is another strength, allowing reception, exhibition, and break areas to be secured flexibly.
Hall Specifications
| Item | Specification |
|---|---|
| Theater Style | Up to 638 seats |
| School Style | Up to 480 seats |
| Flat Floor | 190 tsubo (can be combined with the 115-tsubo foyer area) |
| Foyer | 380 m² · 7 m high |
The hall seats up to 638 in theater style and up to 480 in school style with desks. With chairs removed, the flat floor measures 190 tsubo, and when used together with the adjacent foyer (115-tsubo portion), it can expand into an exhibition or reception space. The foyer is 380 m² and 7 m high, with a 7-meter glass wall that creates a sense of openness — well suited for receptions and reception/registration areas. For the latest detailed specifications, floor plans, and usage terms, please check the official website.
Recommended Hotels Near Otemachi Mitsui Hall
Around Otemachi Mitsui Hall, luxury hotels overlooking the Imperial Palace and Marunouchi are clustered within walking distance. Note that the Otemachi One complex housing this hall is the same complex that contains Four Seasons Hotel Tokyo at Otemachi on floors 34–39 of the adjacent OTEMACHI ONE Tower, which makes it a convenient reference point when choosing nearby lodging. Below are five hotels easy to select by guest seniority and itinerary.
Four Seasons Hotel Tokyo at Otemachi
An urban luxury hotel in the adjacent tower of the same Otemachi One complex as Otemachi Mitsui Hall (floors 34–39 of OTEMACHI ONE Tower). It is accessible from the venue within the complex and via underground passages, making it the most natural fit for a “main venue at Otemachi Mitsui Hall, accommodation at Four Seasons” pairing. The views of the Imperial Palace, Tokyo Station, and Mount Fuji from the 39th-floor reception become the core of the stay experience.
Palace Hotel Tokyo
A Forbes Five-Star hotel facing the Imperial Palace’s Wadakura Moat, directly connected to Otemachi Station Exit C13b and reachable toward the venue via underground passages. Its dining program — including Michelin-starred restaurants — makes it a strong choice for groups seeking to consolidate accommodation and high-end dining in a single property.
Aman Tokyo
An urban resort occupying floors 33–38 of Otemachi Tower, directly connected to the central concourse of the Tokyo Metro Tozai Line. Known for expansive rooms and a Zen-inspired interior design, it also supports split bookings across the Otemachi area as accommodation for VIP guests who prioritize the highest level of privacy.
Hoshinoya Tokyo
A “tower ryokan” toward the Otemachi–Nihonbashi side, built around the concept of a modern Japanese inn. With tatami guest rooms and a top-floor hot spring, it leaves a strong impression on international guests seeking a distinctly Japanese stay experience. As accommodation for VIPs you wish to welcome in a Japanese setting, it adds a memorable accent to multi-day events.
Marunouchi Hotel
A classic hotel inside Marunouchi Oazo, about a 1-minute walk from JR Tokyo Station’s Marunouchi North Exit. It offers excellent access for Shinkansen and Narita Express arrivals and an easy underground route to Otemachi Mitsui Hall. With calm guest rooms and price points suited to business use, it is well matched to operations staff and mid-sized groups.
Recommended Restaurants Near Otemachi Mitsui Hall
The area around the venue offers high-end Japanese cuisine, French, and Chinese with Imperial Palace-side views, plus specialty coffee inside Otemachi One — a well-rounded selection for business meals and dining with international guests. Below are six picks, all within walking distance of the venue and accessible via underground passages even in rain.
Japanese (High-End)
Wadakura (Palace Hotel Tokyo)
On the 6th floor of Palace Hotel Tokyo, a kaiseki restaurant with nine Japanese- and Western-style private rooms, set against the view of the Imperial Palace’s Wadakura Moat. A versatile choice for official dinners with international dignitaries, corporate anniversary dinners, and post-event closing meals at the highest level of formality.
Japanese (Casual)
Washoku En Marunouchi
A Japanese restaurant on the 5th floor of Marunouchi Oazo, delivering ryotei-quality cuisine in a sukiya-modern setting at accessible price points. Available from lunch onward, useful for business lunches before negotiations and for first-meeting dinners with international guests — an option that is not overly formal but consistently refined.
Western
ESTERRE by Alain Ducasse
A one-Michelin-star French restaurant on the 6th floor of Palace Hotel Tokyo (Michelin Guide Tokyo 2026), led by Alain Ducasse. Courses blend the French culinary tradition with Japanese ingredients, suiting multinational VIP dinners, post-event hospitality dinners, and formal meals with international partners.
Asian
Amber Palace (Chuugoku Hanten Kohakukyu)
A one-Michelin-star Cantonese and Shanghai cuisine restaurant on the 5th floor of Palace Hotel Tokyo. Authentic dishes such as Peking duck and shark-fin specialties are served in a space with Imperial Palace-side views. A solid choice for dining with Asian-region guests or for senior team appreciation dinners, with private room options available.
Café
Horiguchi Coffee Otemachi One
A specialty coffee shop on the 1st floor of Otemachi One — the same complex as Otemachi Mitsui Hall. It opens at 7:00 a.m. on weekdays, making it ideal for early-morning setup preparation, a pre-negotiation pause, or short informal meetings with international guests outside the venue.
Bar
VIRTÙ
A signature bar on the 39th floor of Four Seasons Hotel Tokyo at Otemachi, adjacent to the reception. A regular on Asia’s 50 Best Bars and available without a reservation. Well suited to post-event drinks, deal-closing conversations, and informal networking with international guests — networking scenes that benefit from quality but should remain relaxed.
Tips Before You Visit
🚉 Otemachi Is a Major Five-Line Station — Choosing the Right Exit Matters
Otemachi Station handles four Tokyo Metro lines (Marunouchi, Tozai, Chiyoda, Hanzomon) plus the Toei Mita Line, and the walk from platform to exit alone can take 5–10 minutes. Specifying the exits toward Otemachi One (nearer the Chiyoda and Hanzomon lines) in your guidance helps even first-time international guests reach the venue without getting lost.
🚇 Calculate Arrival Times to Include Underground Walking
Walking times from each line to the venue vary — about 2 minutes from the Chiyoda Line versus about 9 minutes from the Tozai Line. Because the underground concourse is large, it is safest to base meeting times on the longest line’s walking time and brief guests with a buffer. For first-time visitors, communicating an earlier arrival time is the reliable approach.
☔ Use the Otemachi–Marunouchi Underground Passage Network in Rain
Otemachi One, Marunouchi Oazo, Marunouchi Building, and Tokyo Station are all connected via underground passages. In rainy weather, the roughly 12-minute covered route from Tokyo Station’s Marunouchi Central Exit reaches the venue without exposure. Including this route in pre-event guidance for Shinkansen and Narita Express guests supports smoother arrivals.
🚕 Watch for Weekday Morning Taxi Congestion
Taxi waits and traffic congestion build up around the Otemachi intersection and Eitai-dori on weekday mornings from 8:00 to 9:00. When dispatching cars after airport limousine arrivals or arranging corporate vehicles from a hotel, allow at least 30 minutes of buffer. The subway is also a reliable alternative in this area.
🌳 Otemachi Forest and Otemachi Place Offer a Quick Break
The area around Otemachi One includes green spaces and open areas such as Otemachi Forest and Otemachi Place. These are easy to use for meetups before and after an event or as short break spaces with international guests — a calm spot in the heart of the city that is worth including in your guidance.
🎭 Cultural Venues Such as the Shiki Theatres Are Nearby
Toward the Hamamatsucho side near the venue are cultural facilities such as the Shiki Theatre Company’s Haru and Aki theatres, and some international guests combine evening events or theater outings with their business schedule. On dates when weekend or evening foot traffic is hard to predict, securing dining and transport reservations early provides peace of mind.
🚧 Ongoing Construction in the Tokiwabashi / Otemachi 2-chome District
As of 2026, construction continues in the Tokiwabashi and Otemachi 2-chome redevelopment district (TOKYO TORCH / formerly the Otemachi 2-chome Tokiwabashi Project), with worksite fencing and detours toward Tokyo Station’s Nihombashi Exit. When walking from the Nihombashi direction, including a reminder to verify routes on the latest Google Maps in pre-event guidance is a useful precaution.
📅 Many Surrounding Office-Building Shops Close on Weekends
Reflecting the area’s business-district character, many shops in the surrounding office buildings (including Horiguchi Coffee) close on weekends and public holidays. For weekend events, confirm operating calendars in advance and build the dining plan around hotel restaurants. The set of viable restaurants here shifts substantially between weekdays and weekends.
This guide is based on official sources and publicly available information as of its publication date. Access routes, operating hours, and venue details are subject to change. Please verify the latest information via the official links provided.