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Shinjuku Sumitomo Bldg. Sankaku Hiroba
新宿住友ビル三角広場
Only events that aim to contribute to the revitalization of the local area under the Tokyo Ordinance for Promoting Stylish Townscapes can be held. A notification to the Tokyo Metropolitan Government is required, and a project outline document must be submitted by one month before the event date. Setup and teardown are done by contractors designated by the operator (designated contractor system); using other contractors incurs a separate "bring-in fee".
- Max capacity
- —
- Largest room
- 2,600㎡
- Address
- Tokyo 163-0290 Shinjuku Sumitomo Building, 2-6-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo
- Nearest stations
- Tochomae Station (Oedo Line) Exit A6: directly connected / Nishi-Shinjuku Station (Marunouchi Line) Exit 2: 4 min walk / Shinjuku Station West Exit (JR, Odakyu and Keio lines): 8 min walk / Shinjuku Station Exit 7 (Shinjuku Line): 8 min walk
- Opening hours
- Usage hours are in principle 0:00 to 24:00. The building entrance is open 5:00-24:00. Usage applications can in principle be made for operating days other than January 1. The inquiry desk is open weekdays 9:00-18:00 (closed Sat, Sun, holidays and the year-end and New Year period).
- Official website
- sumitomo-sankakuhiroba.jp Guide for organizers
Rooms and capacity
| Room | Area (㎡) | Ceiling (m) |
|---|---|---|
| Sankaku HirobaCeiling height up to 25 m (effective 22 m). The maximum capacity of the entire plaza (about 3,450㎡) is about 2,000 people. Floor load capacity: 800kg/㎡ inside the pit, 360kg/㎡ outside the pit. 4K large LED screen of about 564 inches (12.5 m wide x 7 m high). 17 electric prop battens. Reservations are accepted from 2 years in advance. | 2,600 | 22–25 |
| Sankaku Hiroba EastThere are areas where structures cannot be built. Because the battens are on the flow path of visitors to the building, work is in principle done at night. | 350 | — |
| Sankaku Hiroba East 2 | 100 | — |
| Sankaku Hiroba WestThere are areas where structures cannot be built. Because the battens are on the flow path of visitors to the building, work is in principle done at night. | 300 | — |
| Sankaku Hiroba West 2 | 100 | — |
| Multi Room East | 102 | — |
| Multi Room West | 95 | — |
Source: office-b.sumitomo-rd.co.jp (Capacities are the maximums the venue states; they change with layout and equipment.)
Official documents (floor plans, price lists, terms)
Operating rules (from the official website and documents)
Day-before setup
The terms of use set out the procedure for having setup days or teardown days. When there is a setup day, the person in charge fills in a usage time notice at the service center, enters the venue and receives a prior check. Usage hours are in principle 0:00 to 24:00. For packages sent to the facility in advance, the user receives them during the usage period. (Source: Terms of Use created October 1, 2025)
Source: office-b.sumitomo-rd.co.jp (PDF)Load-in and load-out
Delivery vehicles for load-in and load-out must enter and leave within the usage time, and the load-in time may be adjusted by the operator. Submit an advance load-in notice or a load-in/load-out schedule at least 1 week before the first day of use. The loading entrance is the 2F load-in elevator on the Route 10 side (entrance 6,000 mm wide x 3,000 mm high; car interior 6,000 mm wide x 3,000 mm high x 4,000 mm deep; capacity 6,100 kg). Vehicles must be under 4 tons, up to 4 tons in weight (reference size: under 4,000 mm high x 2,400 mm wide x 9,500 mm long), and the turntable diameter is 6,000 mm. (Source: Facility Overview 2025/6/1, Terms of Use created October 1, 2025)
Source: office-b.sumitomo-rd.co.jp (PDF)Delivery vehicle rules
Vehicles cannot be left on site. Products, packing materials, decoration materials, trash and the like may not be left in the loading area during the usage period. Parking cars, motorcycles, bicycles and the like on the street around the building (public open space and the site) can lead to suspension of use. If load-in and load-out vehicles are expected to be congested, traffic staff are placed at the entrance. During load-in and load-out, follow the "Protective Covering Standard Confirmation Form". The outdoor loading area is shared with Shinjuku Sumitomo Hall. (Source: Facility Overview 2025/6/1, Terms of Use created October 1, 2025, Shinjuku Sumitomo Hall Terms of Use 2026ver2)
Source: office-b.sumitomo-rd.co.jp (PDF)Parking
There is no hourly parking lot; use nearby parking lots. (Source: Facility Overview 2025/6/1)
Source: office-b.sumitomo-rd.co.jp (PDF)Waiting rooms and dressing rooms
There are 3 waiting rooms on the 1F. Waiting Room A is 37㎡ (1 table, 10 chairs), Waiting Room B is 14㎡ (1 table, 8 chairs) and Waiting Room C is 14㎡ (1 table, 8 chairs). The reception set cannot be moved. The waiting room pantry on B1F and the waiting room restrooms on B2F are shared with users of Shinjuku Sumitomo Hall. (Source: Facility Overview 2025/6/1)
Source: office-b.sumitomo-rd.co.jp (PDF)Catering and outside food/drink
Eating and drinking are not allowed except in places the operator has approved in advance. For events that handle food, notify the Shinjuku City Public Health Center of the food business license and the like. (Source: Terms of Use created October 1, 2025, Articles 10 and 12)
Source: office-b.sumitomo-rd.co.jp (PDF)Restaurants in the venue or building
The same Shinjuku Sumitomo Building has 10 restaurants on B1F, 4 on 1F and 3 on 2F (listed on the building's official website).
Source: sumitomo-sankakuhiroba.jpOperating rules are limited to what each venue’s official website and official PDFs state. Items that are not listed are ones we could not find on the official website. Always confirm with the venue before you book. (Checked: Nov 2, 2026)
Nearby shops for when something goes wrong on the day
Print shops (large volume, large format)
For posters, panels and large print runs.
- 4 min walk Kinko's Nishi-Shinjuku Weekdays 8:00-20:00 / Sat 10:00-20:00 / Sun & holidays 10:00-20:00
- 6 min walk Accea Nishi-Shinjuku Open 24 hours
Convenience stores (multi-copy machines)
Small print runs, drinks, tape, batteries and similar.
- 2 min walk FamilyMart Shinjuku Island Tower 7:00-23:00 (Sat, Sun & holidays 7:00-21:00)
- 2 min walk FamilyMart Shinjuku Dai-ichi Seimei Building 7:00-23:00
- 3 min walk 7-Eleven Shinjuku Island Tower Daily 7:00-23:00
100-yen shops
Masking tape, scissors, badge holders, extension cords, plastic bags and similar.
- 4 min walk Can Do Nishi-Shinjuku Daily 9:00-22:00
- 7 min walk DAISO Shinjuku Cocoon Tower 8:00-21:00
Don Quijote
For late-night or day-of-event shopping.
- 11 min walk Don Quijote Shinjuku Kabukicho Open 24 hours
- 12 min walk Don Quijote Shinjuku Tonanguchi Open 24 hours
If you run out of drinks (same-day delivery)
This venue is in Kakuyasu's same-day delivery area. Kakuyasu (Nandemo Sake-ya Kakuyasu) “delivery from store” covers all 23 wards of Tokyo and all of Nishi Ward in Yokohama for same-day delivery (free shipping). Delivery slots are hourly from 10:00 to 22:00 (order cutoff 30 minutes before; some stores also offer the 9:00 slot). Besides alcohol, they also carry soft drinks such as tea.
Source: Kakuyasu: store delivery areas (Japanese) / Kakuyasu: delivery dates and times (Japanese)
Walking minutes are the straight-line distance to the venue divided by 80 m per minute, as a rough guide (the actual walking route is longer). Shop names and opening hours were checked on each company's official store page (as of Nov 2, 2026).
Nearby hotels
Places to stay for staff who arrive the day before or travel from far away. These are the hotels around Shinjuku Sumitomo Bldg. Sankaku Hiroba featured on BizinTokyo, our guide for attendees.
- Hyatt Regency Tokyo About 2 min walk to Shinjuku Sumitomo Bldg. Sankaku Hiroba
- Keio Plaza Hotel Tokyo About 2 min walk to Shinjuku Sumitomo Bldg. Sankaku Hiroba
- Hilton Tokyo About 2 min walk to Shinjuku Sumitomo Bldg. Sankaku Hiroba
- Keio Plaza Hotel Tokyo PremierGrand About 3 min walk to Shinjuku Sumitomo Bldg. Sankaku Hiroba
- Shinjuku Washington Hotel Main About 6 min walk to Shinjuku Sumitomo Bldg. Sankaku Hiroba
- Park Hyatt Tokyo About 7 min walk to Shinjuku Sumitomo Bldg. Sankaku Hiroba
* Hotel links are Expedia affiliate links. Conectando earns a referral fee when a booking is made.
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