What Oshima Shipbuilding does

Oshima Shipbuilding (株式会社大島造船所, 大島造船所) is a privately held Japanese shipbuilder founded in 1973 and headquartered in Saikai City, Nagasaki Prefecture. The company operates three business domains: (1) Shipbuilding — its core activity — focused on the construction of medium and small-sized bulk carriers (ばら積み貨物船), where it holds approximately 24% of the Japanese market and has cumulatively delivered 1,094 vessels through end-May 2026; (2) Steel Structures — building and maintaining bridges, offshore marine steel structures, and water-gate systems for public-sector and infrastructure clients; and (3) Agriculture — production and sale of regional specialty products, notably tomatoes, under a community-co-prosperity motto. Manufacturing is conducted across two shipyards (Oshima Factory and Koyagi Factory in Nagasaki City), supplemented by sales/marketing offices in Tokyo, Osaka, Fukuoka, Nagasaki, Sasebo, and Kagoshima, plus international operations in London (Oshima Shipbuilding Europe Limited) and Hanoi (Daizo-Tech, wholly-owned subsidiary).

The company sells primarily through direct B2B enterprise field sales to global shipping companies and maritime operators, with bespoke negotiated contracts for individual vessels; pricing is not publicly disclosed. The underlying technology is conventional Japanese shipbuilding for medium-tonnage dry-bulk hulls, steel fabrication for bridges and marine structures, and greenhouse agriculture. Recent strategic emphasis includes participation in Japan's national initiative to revive domestic LNG carrier construction (announced March 2026), partnerships for sustainable yard logistics (Daizo Corporation's e-NEO NEO-ONE EV, June 2026), and active government engagement (inspections by the Minister of Land, Infrastructure, Transport and Tourism and former Prime Minister Kishida in June 2026). The company's core advantage is its specialized construction capability and proven track record in the medium/small bulk-carrier segment, supported by approximately 1,773 employees as of April 2026.

Name

Oshima Shipbuilding

Legal name

株式会社大島造船所

Website

https://jp.osy.co.jp

Company type

Private

Founded year

1973

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Oshima Shipbuilding (大島造船所) is a privately held Japanese shipbuilder (founded 1973, ~1,773 employees) that designs and builds medium and small-sized bulk carriers from two shipyards in Nagasaki Prefecture, holding about 24% of Japan's bulk-carrier market, with complementary steel-structure and agriculture businesses.

Ownership category

akta.pro rank

Product category

Commercial Shipbuilding

NAICS

Ship Building and Repairing (336611)

SIC

Ship & Boat Building & Repairing (3730)

akta.pro primary industry

Bulk Carrier Shipbuilding (Dry Bulk: Capesize/Panamax/Handysize) (IMAJAAAA)

Keywords

• Bulk carrier construction
• Commercial shipbuilding
• Steel bridge fabrication
• Marine vessel manufacturing
• Offshore steel structures

Headquarters

HQ city

Saikai

HQ country

Japan

HQ region

Asia

Offices12 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Infrastructure, Technology or R&D

Revenue model

1. Shipbuilding - Bulk Carriers: Oshima Shipbuilding generates revenue primarily through building and delivering ships, with bulk carriers as its main product. The company also operates a steel structure business constructing bridges and marine steel structures, and an agriculture business producing tomatoes and other products.
2. Steel Structure Construction: Construction of bridges, floating piers, and other marine steel structures, including maintenance and repair services for these structures.
3. Agriculture Business: Agricultural product sales, including tomatoes and local specialty products sold under the motto of 'growing together with the local community.'

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Oshima Shipbuilding constructs medium and small-sized bulk carriers at its Saikai shipyard in Nagasaki Prefecture, delivering newbuild vessels to shipowners worldwide. The company also fabricates steel structures including bridges and offshore platforms under its steel structures division, and operates a small agricultural unit producing tomatoes. The core revenue driver is newbuild bulk carrier construction, supported by steel structure fabrication.

Product overview

Oshima Shipbuilding operates three core business divisions: (1) Shipbuilding — the primary business focused on bulk carriers (ばら積み貨物船), where the company holds approximately 24% market share in Japan's bulk carrier market and has delivered 1,094 vessels as of May 2026; (2) Steel Structures (鉄構事業) — building and maintaining bridges, offshore steel structures, and water gates; and (3) Agriculture (農産事業) — producing agricultural products such as tomatoes under a regional co-prosperity motto. The company is headquartered in Saikai City, Nagasaki Prefecture, with approximately 1,773 employees.

Differentiator

Problem solved

Functional benefit

Brands

• 農産事業 (Agriculture Business): Agricultural products business. The company sells agricultural products such as tomatoes alongside shipbuilding, operating under the motto '地域と共に' (together with the community).

Products and services

• Bulk Carriers (Newbuild Shipbuilding) Design and construction of newbuild medium and small-sized bulk carriers (handysize and supramax-class) for commercial shipowners and shipping operators worldwide. Approximately 24% share of Japan's bulk carrier market.
• Steel Structures (Bridges and Offshore Structures)

Quantifiable outcome

• 24% market share in Japan's bulk carrier market (as of December 2025)
• +1 more outcomes

Named customers1 record

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• Daizo CorporationminorStrategic or Co-development Partner · 1 June 2026Daizo Corporation (based in Osaka) has integrated its 'e-NEO NEO-ONE' electric vehicle mobility brand into Oshima Shipbuilding's operations at the Nagasaki Prefecture shipyard. The compact three-passenger EV is designed to improve internal mobility at the large shipyard facility while eliminating CO2 emissions and reducing fuel costs. Daizo is also seeking collaborations with local governments for broader trials of sustainable mobility solutions beyond island communities.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Imabari Shipbuilding: Imabari is Japan's largest shipbuilder and the most direct domestic competitor to Oshima, building bulk carriers, container ships, and tankers. Notably named alongside Oshima in the Japanese government's 2026 LNG carrier revival initiative, making it the closest like-for-like comparable for a PE investor evaluating Oshima's strategic positioning.
• Mitsui E&S Shipbuilding: Mitsui E&S Shipbuilding is a historic Japanese shipbuilder now structured to focus on naval/defense, but with prior commercial bulk carrier construction experience. Useful comparable for engineering capability depth and Japan-domestic yard economics.
• Kawasaki Heavy Industries: Kawasaki Heavy Industries is a diversified Japanese conglomerate with a shipbuilding division building LNG carriers, bulk carriers, and naval vessels. As a Japanese incumbent entering LNG alongside Oshima, it represents the strategic competitor in the LNG pivot specifically.
• Mitsubishi Heavy Industries: Mitsubishi Heavy Industries is a major Japanese heavy industrial conglomerate with shipbuilding capabilities including LNG carriers and naval vessels. Provides a benchmark for diversified Japanese industrial conglomerates competing in adjacent maritime construction segments.
• Hyundai Heavy Industries: Hyundai Heavy Industries is one of the world's largest shipbuilders and a dominant force in LNG carrier construction. Represents the strategic incumbent Oshima must compete with to win LNG carrier share.
• Daehan Shipbuilding & Marine Engineering (Hanwha Ocean): Daehan Shipbuilding (now Hanwha Ocean) is a major Korean shipbuilder active in bulk carriers and LNG vessels. Useful for benchmarking the Korean competitive benchmark that drives global bulk carrier and LNG pricing.

Direct peers

• Tsuneishi Shipbuilding (CICS): Tsuneishi Shipbuilding is a mid-sized Japanese bulk carrier specialist with yards in Japan and the Philippines, directly competing with Oshima in the Panamax/Handysize bulk carrier segments. Closest size and product-line comparable to Oshima in the Japanese mid-tier shipbuilder segment.
• Namura Shipbuilding: Namura Shipbuilding is a Japanese mid-tier shipbuilder with direct overlap with Oshima in medium-sized bulk carriers. Comparable in scale and product mix to Oshima, serving the same customer base of Japanese and international ship owners.
• Sanoyas Hishino Meisho (Sanoyas Holdings): Sanoyas Hishino Meisho is a Japanese mid-sized shipbuilder with established bulk carrier construction capabilities, including specialized vessels. Provides a direct comparable for share-of-wallet economics and yard productivity benchmarks in the Japanese mid-tier shipbuilder cohort.
• Hyundai Mipo Dockyard: Hyundai Mipo Dockyard is a Korean mid-sized shipbuilder specializing in smaller bulk carriers and product/chemical tankers, directly comparable in size and product focus to Oshima. Relevant for cross-border benchmarking on Korean yard productivity and pricing pressure.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/daizou.brass
• LinkedInlinkedin.com/company/oshima-shipbuilding

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries2 records

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 Oshima Shipbuilding