Seibundo Shinkosha

What Seibundo Shinkosha does

Seibundo Shinkosha (株式会社誠文堂新光社) is a privately held Japanese publishing company founded in 1912 and headquartered in Japan, operating across a diversified portfolio of books, magazines, mooks (special-issue publications), e-books, branded merchandise, and event programming. The company publishes across 12 specialized genres — science and technology, computer/IT, astronomy and space, art and design, crafts and handicrafts, cooking, lifestyle, flower arranging and gardening, pets, hobbies, children's books, and general interest — and runs multiple flagship magazine franchises including Monthly Astronomical Guide (月刊天文ガイド), Children's Science (子供の科学, established 1924), MJ Wireless and Experiment (MJ無線と実験), Idea (アイデア), and Florist (フローリスト). Underlying technology consists of a multi-format e-book distribution platform that delivers titles through Kindle, Rakuten Kobo, iBooks, Google Play Books, and Japanese-specific retailers alongside physical distribution through Amazon, Rakuten, Kinokuniya, 7net, Yodobashi, and Maruzen-Junkudo chains. Revenue is generated primarily through one-time book sales (price range 1,430-6,600 JPY), monthly magazine subscriptions and single issues, recurring e-book fair promotions (e.g., 50% off titles above 2,400 JPY), institutional library set sales, custom self-publishing services (自費出版), and ancillary merchandise. Customer segments span science and craft hobbyists, astronomy enthusiasts, children and parents, culinary readers, and libraries/schools, supported by a multi-channel social media presence (X, Instagram, Facebook, YouTube, Niconico, Note) and creative campaigns such as the 'ぬりえ' (Color Campaign) coloring competition for children's titles. The company is independently owned with no disclosed external investors, subsidiaries, or parent entity.

Name

Seibundo Shinkosha

Legal name

株式会社誠文堂新光社

Website

https://seibundo-shinkosha.net

Company type

Private

Founded year

1912

Operating status

Operating

Headcount range

51–100 employees

Short description

Seibundo Shinkosha is a privately held Japanese publisher founded in 1912 that produces books, magazines, and e-books across 12 specialized genres including science, astronomy, crafts, cooking, and children's education, distributed domestically through major Japanese bookstores, e-book platforms, and dedicated library channels.

Ownership category

akta.pro rank

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Markets served

GTM type

B2C

Offering type

Digital Commerce or Content

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Others

Pricing tiers

Distribution channels5 records

Marketing channels5 records

Core offering

Seibundo Shinkosha is a Japanese publishing company that produces and sells specialized books, magazines, and mooks across 12 genres including science and technology, astronomy, crafts, cooking, children's education, art, lifestyle, gardening, pets, and hobbies. The company also offers associated e-book editions through major digital platforms, curated library book sets for institutions, custom (self-publishing) services for authors, branded merchandise, and publication-themed events.

Product overview

Seibundo Shinkosha is a long-established Japanese publishing company founded in 1912, celebrating its 100th anniversary in 2012. The company operates a diversified publishing portfolio consisting of books and magazines/mooks across 12 core genres: science/technology/agriculture, computer/IT, astronomy/space, art/design, crafts/handicrafts, cooking, lifestyle, flower/gardening, pets, hobbies, children's books, and general interest. The core publishing business is supported by several flagship magazine brands including '月刊天文ガイド' (Monthly Astronomical Guide), '子供の科学' (Children's Science), 'MJ無線と実験' (MJ Wireless and Experiment), 'アイデア' (Idea), and 'フローリスト' (Florist). The company also offers supplementary services including events, merchandise, library book sets, and custom publishing services. E-book versions are available through major digital platforms.

Differentiator

Problem solved

Functional benefit

Products and services

• 書籍 (Books) General book publishing line spanning 12 genres including science, technology, astronomy, art, crafts, cooking, lifestyle, gardening, pets, hobbies, children's books, and general interest titles, sold to individual readers across all major Japanese retail and e-book platforms.
• 雑誌・ムック (Magazines and Mooks) Periodical magazine and mook (magazine-book hybrid special issue) publications, including astronomy, children's science, wireless/experiment, craft, and design titles, sold on subscription and via single-issue purchase to individual readers.
• 月刊天文ガイド (Monthly Astronomical Guide) Leading astronomy magazine covering celestial observation, astronomy news, and star charts, sold on subscription and by single issue to amateur astronomers and stargazing enthusiasts in Japan.
• 子供の科学 (Kodomo no Kagaku / Children's Science) Science magazine for children and youth that makes scientific topics accessible and engaging for young readers; sold via subscription and single-issue purchase, often acquired by parents for their children.
• MJ無線と実験 (MJ Wireless and Experiment) Magazine covering wireless technology and experimental electronics, sold to amateur radio operators, electronics hobbyists, and experimenters.
• アイデア (Idea) Creative design magazine covering design, advertising, and creative-industry insights, sold to professional and enthusiast designers in Japan.
• フローリスト (Florist) Magazine for flower-arrangement and floristry professionals and enthusiasts, sold by subscription and single issue.
• 天文年鑑 (Astronomical Yearbook) Annual reference publication serving as the definitive guide to astronomical observations in Japan, sold annually to amateur and professional astronomers.
• イベント (Events) Publication-themed events including book fairs and specialty exhibitions tied to the company's magazines and books, sold/offered to readers and enthusiasts.
• グッズ (Goods) Branded merchandise including stationery and specialty items tied to company publications, sold direct to readers and enthusiasts.
• 図書館様向けセット (Library Sets) Curated book sets specifically designed for library and school collections, sold directly to libraries and educational institutions via a dedicated ordering system.
• 自費出版 (Custom Publishing / Self-Publishing Service) Fee-based self-publishing service for authors who wish to independently publish their works through Seibundo Shinkosha's editorial, production, and distribution infrastructure.
• 電子書籍 (E-books) Digital editions of Seibundo Shinkosha's book titles distributed through major e-book platforms including Amazon Kindle, Rakuten Kobo, iBooks, Google Play Books, and honto, available direct to consumers.

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Futabasha: Long-established Japanese publisher producing books and magazines across multiple genres including lifestyle, cooking, and hobby titles. Comparable diversified publishing model with similar category breadth to Seibundo Shinkosha.
• NHK Publishing: Publishing arm of Japan's national broadcaster, producing books and magazines tied to NHK programming. Comparable as a Japanese specialty publisher with broad genre coverage including lifestyle, science, and educational content overlapping Seibundo's portfolio.
• Iwanami Shoten: Major legacy Japanese publisher with century-old history producing scholarly, general interest, and specialty titles. Comparable in longevity and breadth of publishing activities, though skewed more toward academic content than Seibundo's hobbyist focus.
• PHP Institute: Established Japanese publisher of general interest, business, and educational books and magazines. Larger and broader than Seibundo Shinkosha, with overlapping general-interest publishing activities but operating at greater scale across multiple imprints.

Direct peers

• Gakken Holdings: Japanese educational publisher with strong children's science and learning magazine franchises (e.g., 'Science'/'学習'), directly comparable to Seibundo's iconic 'Kodomo no Kagaku' (Children's Science) magazine. Both target youth and family educational content in Japan.
• Nihon Vogue Sha: Japanese specialty publisher strongly focused on handicrafts, knitting, and lifestyle craft books and magazines. Directly comparable to Seibundo Shinkosha's craft and handicraft publishing segment, operating with similar niche editorial model in the Japanese market.
• Nihon Bungeisha: Japanese publisher covering manga, hobby magazines, and general interest books. Comparable diversified publishing business with overlapping hobby and general-interest categories relevant to Seibundo's portfolio.
• Hobby Japan: Japanese specialty publisher focused on hobby genres including tabletop games, models, and specialty magazines. Comparable niche-hobby publishing model with similar reader-community-driven business, overlapping with Seibundo's hobby and electronics segments.
• Magazine House: Japanese publisher of curated lifestyle and design magazines (e.g., 'Casa BRUTUS', 'POPEYE'). Comparable specialty magazine business with lifestyle and design content overlapping with Seibundo's 'Idea' and lifestyle titles.
• Sekai Bunka Sha: Japanese specialty book publisher covering lifestyle, cooking, home, and hobby genres. Closely mirrors Seibundo Shinkosha's diversified 12-genre approach with overlapping categories including cooking, lifestyle, and general interest titles.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/seibundo_hanbai
• YouTubeyoutube.com/channel/UC55tCoiZG_e5jlUrxR7bEKg
• Facebookja-jp.facebook.com/seibundoshinkosha
• Instagraminstagram.com/seibundoshinkosha

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Seibundo Shinkosha