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Private company

Seiunsha

Seiunsha is a Japanese company based in Tokyo.1

株式会社星雲社（せいうんしゃ）は、東京都文京区に本社を置く流通責任出版社（書籍の発売代行会社）。2 From the Japanese Wikipedia, CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

  • HeadquartersTokyo, Japan1

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Corporate structure

Seiunsha sits at the top of its group. 1 entity, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

  • Seiunsha Tokyo, Japan
    • Regina Books Owned · Japan

Built from subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

What it owns

What Seiunsha reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Stakes and holdings (Wikidata)

  • Regina Books

Things Wikidata records the company as owning, with the share when stated.1

Subsidiaries and ownership

Also owns

  • Regina Books

From Wikidata.1

Sources

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

  1. 1
  2. 2