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OFFICES › SHIODOME, TOKYO › MITSUI & CO. PROJECT SOLUTIONS

Office · Shiodome, Tokyo · Trading

Mitsui & Co. Project Solutions — Shiodome: group address, on one uninterrupted floor

This Mitsui infrastructure trading arm gave each department its own stretch of desk rather than fixed seats or a free-for-all, kept the floor in one unbroken piece, and put the sofas where Tokyo Tower is in the window.

Company Mitsui & Co. Project Solutions Ltd. (三井物産プロジェクトソリューション株式会社)Location Shiodome Sumitomo Building, 26F, Higashi-Shimbashi, TokyoDesks Group address — each department picks its seats freely within its own areaFloor Kept as one continuous floor, so that working with another department is easyPlanting Heavy, in the communication area; a pantry with drinks and light foodSofa area At the window, with a view of Tokyo Tower; close enough to the desks for a short meetingTagline “Be in Charge” — taking responsibility for the infrastructure of a new eraShown Reception, working area, communication area, sofa areaWebsite mps.mitsui.com ↗
Reception
Reception

Concept

Between fixed seats and free address

The company describes its aim for the office in one sentence — somewhere anyone can work comfortably — and then makes one structural decision that is more interesting than the sentence. The desks are group address: a department is given an area and chooses its seats within it, rather than everyone sitting where they always sat, or everyone sitting anywhere.

The second decision supports the first. The floor is kept as a single continuous piece, with nothing cutting it into departments, on the stated grounds that this makes working with another department easy. Group address without an unbroken floor would simply be fixed seating with extra steps.

The working area
The working area
The communication area
The communication area

01 · Reception

A counter, and then the floor

The lift opens onto a reception with the company name on the wall and a bench beside it, and the working floor begins immediately behind.

Reception
Reception

02 · The working area

One floor, no divisions

The desks run without partitions between departments. Each group takes its own stretch and chooses seats inside it, which keeps a team together while leaving the floor legible from end to end.

The working area
The working area
Along the desks
Along the desks
Desks and screens
Desks and screens

03 · The communication area

Planting, and a pantry

The area given over to talking is planted heavily, which the company says makes it easier to relax in and livelier to meet in. A pantry beside it keeps drinks and light food.

The communication area
The communication area
The pantry end
The pantry end
Seating in the communication area
Seating in the communication area

04 · The sofa area

Tokyo Tower, from a short meeting

At the side of the floor, tables and sofas are set in front of a large window with Tokyo Tower in it. The company is straightforward about why it is placed there: it is close to the desks, so it takes a short meeting as easily as a break.

The sofa area
The sofa area
Sofas at the window
Sofas at the window
Looking back across the floor
Looking back across the floor
CompanyMitsui & Co. Project Solutions Ltd.
Design[to confirm]
Photography© Mitsui & Co. Project Solutions Ltd. (from the company’s own site)
SourceMitsui & Co. Project Solutions, “オフィスツアー”, re-reported by WALL ↗
PublishedSeptember 2026
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