Private company

Nikken Sekkei

Logo: Nikken Sekkei Ltd., Public domain, via Wikimedia Commons3

Japanese architecture firm

Nikken Sekkei Ltd. (日建設計) is an architectural, planning and engineering firm from Japan, with headquarters in Chiyoda, Tokyo. As of 2019, Nikken Sekkei ranks as the second largest architectural practice in the world.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1900Founded1
  • Industryarchitecture, urban planning1
  • HeadquartersChiyoda1
  • Founded inTokyo1
  • Websitewww.nikken.co.jp/ja
  • Legal formkabushiki gaisha1
Nikken sekkei tokyo building iidabashi
Photo: Kamemaru2000, CC BY-SA 3.0, via Wikimedia Commons5

Nikken Sekkei Ltd. (日建設計) is an architectural, planning and engineering firm from Japan, with headquarters in Chiyoda, Tokyo. As of 2019, Nikken Sekkei ranks as the second largest architectural practice in the world.2

The story

Nikken Sekkei dates its origins back to 1900, as an offspring of Sumitomo Corporation. Under the name of Sumitomo Temporary Architecture Department, it was founded in response to Sumitomo's need to establish a headquarters. The company established its independence from the Sumitomo Corporation in the 1950s under the name Nikken Sekkei Komu Co. Ltd. As a private practice since 1970, Nikken Sekkei has maintained its In-house Shareholder Corporate System and is partly owned by its employees.

Nikken Sekkei together with Nikken Sekkei Research Institute (NSRI), Hokkaido Nikken Sekkei, Nikken Sekkei Civil Engineering (NSC), Nikken Housing System Ltd (NHS), Nikken Space Design (NSD), Nikken Sekkei Construction Management (NCM) forms the Nikken Group.

In 2018, Nikken Sekkei was shortlisted for the European Cultural Centre Architecture Award.

From Wikipedia’s article on Nikken Sekkei, shared under CC BY-SA 4.0.4

Timeline

  1. 1900Founded Founded in Tokyo1

Sources

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