Private company

Seijo Ishii

Logo: seijoishii.co.jp3

Seijo Ishii is a Japanese supermarket chain based in Nishi-ku, founded in 2011.1 It is part of Lawson.1

株式会社成城石井（せいじょういしい、英: SEIJO ISHII CO.,LTD.）は、日本のスーパーマーケット。神奈川県横浜市西区に本社（登記上の本店は東京都世田谷区成城）を置き、関東地方を中心に東北地方・中部地方・近畿地方・中国地方に店舗を展開するチェーンストアである。三菱商事・KDDI傘下のローソンの完全子会社。2 From the Japanese Wikipedia, CC BY-SA 4.0

Last updated Oct 20, 2026.

Overview

2011Founded1

See how the biggest companies compare on our leaderboards

Seijyo-Seijyo-Ishii Mart at Whity Umeda
Photo: MASA, CC BY-SA 3.0, via Wikimedia Commons4

Corporate structure

Seijo Ishii is part of a group headed by Lawson. 10 entities, 2 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • Lawson 東京都, Japan
    • Seijo Ishii Nishi-ku, Japan
    • Lawson Bank Subsidiary · 95% · Tokyo, Japan
    • Lawson Entertainment Subsidiary · Gate City Ohsaki, Japan
      • Mastard Records Subsidiary · Japan
    • L･TF Stake · 49% · Yokohama, Japan
    • Three F Stake · 4.77% · Kanagawa Prefecture
    • Lawson 108 Subsidiary · Thailand
    • Lawson Store 100 Subsidiary · Japan
    • Lawson Store100, Inc. Subsidiary · Japan

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

Subsidiaries and ownership

Parent company

From Wikidata.1

Timeline

  1. 2011Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2
  3. 3
    Company websiteSeijo Ishii logo
  4. 4