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Office · Kanda, Tokyo · Manufacturing

Earth Corporation — Kanda: a ceramic panel of your own products, and a room holding a hundred species of pest

The company that makes Japan’s insect repellents, bath salts and mouthwash shows four of its eleven sites in one tour — and the most memorable room in it is the one where the insects live.

Company Earth Corporation (​アース製薬株式会社) ↗Sites Eleven in Japan; four are shown — the head office, Act Terrace, the research centre and the Ako factoryHead office Kanda, Tokyo — corporate strategy, administration and marketingReception A bright, white-based space; visitors are met by a distinctive ceramic panel set with the company’s productsFree address The head office is rolling free address out across every floor, in step with working from homeCOSMOS A meeting room the company singles out for its interior; used for board meetings and final interviewsTop floor A staff-only lounge, sunlit, described as the head office’s place to restAct Terrace Next door to the head office; the sales headquarters and metropolitan sales divisions. A painting of the earth made for the company, and projection mapping on a large screen, meet visitorsResearch centre Ako, Hyogo, completed 2002. Open-door policy: walls and columns kept to a minimum so that anyone can hold a discussion anywhereThe breeding room About a hundred species of pest insect from Japan and abroad, kept at controlled temperature and humidity so that they can be bred generation after generationTest chambers Rooms for measuring how a spray disperses, and for efficacy tests with live insects released into themAko factory The Mondahmin plant, built in 2017 on a “factory to be seen” brief, with a public viewing routeAko break space Refitted in 2020 as the place where everyone working at Ako gathers; a staff canteen, and a different interior in each areaShown Twenty-five rooms across four sites
The head office reception
The head office reception

Concept

The company that has to keep its subject alive

Most manufacturers keep a sample room. Earth Corporation keeps a zoo. In the research centre at Ako there is a breeding room holding about a hundred species of pest insect from Japan and overseas, at a temperature and humidity steady enough that the colonies can be bred generation after generation — because you cannot test a repellent without something to repel. Down the corridor are a chamber for watching how a spray disperses and another where live insects are released into the product to see what happens.

The company is entirely cheerful about this. The research centre’s entrance displays the products alongside, in its own words, artworks with that insect as their motif, and the visitor route ends with a section themed on the five senses where, the site notes, you might get to touch one. A firm whose business is killing something has decided that the honest thing to do is to show the thing alive, framed and lit, at the front door.

The breeding room
The breeding room
The research centre entrance
The research centre entrance

01 · The head office

A ceramic panel of your own products

Reception in Kanda is a bright white room, and the thing it puts in front of a visitor is a ceramic panel set with the company’s own products. The head office holds corporate strategy, administration and marketing, and is rolling free address out floor by floor.

The reception
The reception
The ceramic panel
The ceramic panel

02 · COSMOS, and the rest

Board meetings and final interviews

The company singles out one meeting room, COSMOS, for its interior; it takes board meetings and final interviews. Alongside it are an open space anyone can drop into and a room fitted for remote meetings.

COSMOS
COSMOS
The open space
The open space
The meeting room
The meeting room

03 · The top floor

Sunlight, and nobody’s desk

The top floor is a staff-only lounge, used for internal discussions and for doing nothing in particular. The company describes it simply as sunlit and as the head office’s place to rest.

The lounge
The lounge
The sunlit end
The sunlit end

04 · Act Terrace

The earth, projected

Next door, Act Terrace holds the sales divisions. Visitors meet a painting of the earth made for the company and projection mapping on a large screen; beyond it are meeting spaces, a staff café named for the “Act” kind of person, a room with a projector, and sofas for lunch or for thinking.

Act Terrace
Act Terrace
The earth
The earth
By the entrance
By the entrance
A meeting space
A meeting space
The café
The café
The self-service counter
The self-service counter
The projector room
The projector room
The sofas
The sofas

05 · The research centre

Ako, and the open door

The Ako research centre was completed in 2002 and run on an open-door policy, with walls and columns kept to a minimum. Its entrance shows the products next to artworks based on the insects; inside, everything is white for hygiene.

The entrance
The entrance
The white interior
The white interior
The test chamber
The test chamber

06 · The insects, and the factory

A hundred species, then lunch

The breeding room holds about a hundred species; a display area takes visiting customers and study groups. At the Ako factory the public viewing route explains the plant and the company’s history, and the break space — refitted in 2020, with a canteen — changes its interior from area to area.

The breeding room
The breeding room
The display
The display
The viewing route
The viewing route
The break space
The break space
A different interior
A different interior
After lunch
After lunch
The partitioned end
The partitioned end
CompanyEarth Corporation ↗
Photography© Earth Corporation (from the company’s own graduate recruiting site)
Sourceアース製薬, “オフィス紹介”, re-reported by WALL ↗
PublishedSeptember 2026
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