Japan’s best-designed offices — one company, one walkthrough
OFFICES › OSAKI, TOKYO › SEGA SAMMY

Office · Osaki, Tokyo · Entertainment

SEGA SAMMY — Osaki: a headquarters built as a harbour

SEGA SAMMY calls its Osaki head office GRAND HARBOR and designed every area around one idea: a harbour at the start of a great journey. Meeting rooms carry the names of port cities, and the canteen is the inn where the journey rests.

Company SEGA SAMMY HOLDINGS INC.Location Osaki, Shinagawa, TokyoConcept GRAND HARBOR — beginning of a journeyWork floor about 1,660 tsubo per floorWebsite segasammy.co.jp ↗
The reception area
The reception area

Concept

A harbour, not a lobby

The office is named GRAND HARBOR and planned around the concept “a harbour that promises a great journey”. Each area follows that idea, so that everyone who arrives is invited into a journey in search of dreams and excitement.

The lounge where visitors wait is styled as a CABIN, with luggage, a world map and world clocks; a brand wall plays the group’s latest work, and the SEASIDE SHOP sells goods you can only buy here — souvenirs from the journey.

The waiting lounge, styled as a cabin
The waiting lounge, styled as a cabin

01 · Reception

A cabin, a brand wall and a shop

Visitors are met at the reception and pass the brand wall and the world map on the way in. The shop beside it carries limited goods made for the company.

The brand wall
The brand wall
The world map
The world map

02 · Workspace

One mega floor, few walls

A single floor of about 1,660 tsubo is kept as open as possible, with the walls between departments removed so that people from different teams meet. The room where the direction of the company is decided is designed as the COMPASS.

The open work floor
The open work floor
The COMPASS meeting room
The COMPASS meeting room

03 · Meeting rooms

Named after port cities

Meeting rooms are named after ports around the world — Hong Kong, Incheon, Wellington, Barcelona, Saint Petersburg, Edinburgh, Funafuti. There is no room beginning with Z, because Z would mean the end of the journey.

A port-city meeting room
A port-city meeting room
Another meeting room
Another meeting room

04 · Canteen

JOURNEY’S CANTEEN

The staff canteen is designed as the inn where the journey rests: buffet and à la carte menus, darts and cards for the people who want to talk, and a bar in the evening.

The canteen
The canteen
Seating in the canteen
Seating in the canteen

05 · Free workspace

FREEPORT, ANCHOR and a tunnel

FREEPORT and ANCHOR are free workspaces in the Osaki head office — open space for talking, booths for concentrating, and private booths for online meetings, with one area built entirely around deep focus. The group also runs Tunnel Tokyo, a membership coworking space where its employees sit alongside startups and independent founders.

A focus booth
A focus booth
The free workspace
The free workspace

06 · Events

Halloween, and a tuna show

Because many group companies sit in the same building, internal events are part of the year: a Group Day for families and friends, Halloween worked in full costume, a bluefin tuna cut up in front of everyone in the canteen and served at lunch, and nature days in the company’s own forest.

An event in the office
An event in the office
CompanySEGA SAMMY HOLDINGS INC.
Official websitesegasammy.co.jp ↗
Design[to confirm]
Photography© SEGA SAMMY HOLDINGS (from the company’s recruiting site)
SourceSEGA SAMMY official office tour page, re-reported by WALL
PublishedSeptember 2026
OFFICEMILL — explore offices across Japan
Planning an office in Japan?The design and build firms behind the offices on WALL are listed on our Partners page.
SEE PARTNERS