What Zeni Lite Buoy does

Zeni Lite Buoy Co., Ltd. (株式会社ゼニライトブイ) is a Japanese marine aids-to-navigation (AtoN) manufacturer founded in 1972 as a spin-off from Zeniya Aluminum Engineering Works, with the underlying buoy-light technology dating to 1963. The company designs, manufactures, and sells a complete product line of lighted and unlighted buoys, lighthouses, lanterns, observation/sensor buoys, AIS transponders (Class B ZSA and the world's-first AtoN AIS "Akari" introduced in 2002), and rescue/disaster-prevention products. Core technical competencies include engineering buoys to withstand Japan's extreme marine conditions (15m waves, 8-9 knot tidal currents), proprietary GPS-based wave measurement using JAXA-developed digital filtering (Patent No. 3658595), spar buoys with attitude stabilization (developed under NEDO), and a swift-current-resistant buoy design patented in 10 countries.

The company operates two manufacturing sites in Japan (Ikeda, Osaka and Tamashima, Okayama) plus a Singapore production presence via group affiliates, and sells exclusively through direct enterprise field sales across seven domestic offices (Tokyo, Osaka, Sapporo, Hiroshima/Sendai, Fukuoka) and a Singapore office handling international inquiries. Revenue is generated primarily from custom-quoted hardware sales of buoys, lanterns, AIS, monitoring systems and spares, supplemented by engineering/consulting and maintenance services for installed systems. The customer base spans Japan Coast Guard, major infrastructure developers (Seto Ohashi Bridge, Tokyo Bay Aqua-Line, offshore airports), power/energy and LNG operators, fisheries/aquaculture cooperatives, universities/marine research institutes, and offshore wind farm developers.

The company holds ISO 9001 certification and active memberships in IALA, IHMA, and CIRM. Its registered capital is only ¥30 million with reported headcount of 77 (January 2020) and is privately held within the Zeniya Aluminum Group conglomerate. No revenue is publicly disclosed. Recent activity (2022-2024) has centered on product-line refreshes (ZL-LS115 with built-in GPS sync, ZF-G6 synchronization device, high-pressure small lighted buoy, fixed-and-flashing lantern), the Sendai-Sapporo sales office consolidation (April 2023), Tokyo office relocation (October 2022), and website renewal (April 2024), alongside positioning for offshore wind and smart-aquaculture markets.

Name

Zeni Lite Buoy

Legal name

Zeni Lite Buoy Co., Ltd.

Website

https://zenilite.co.jp

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

101–250 employees

Short description

Zeni Lite Buoy is a Japanese manufacturer of marine aids-to-navigation and oceanographic monitoring equipment, including buoys, lanterns, lighthouses, AIS transponders, and observation systems, serving government, infrastructure, energy, fisheries, offshore wind, and research customers globally.

Ownership category

akta.pro rank

Product category

Marine Aids-to-Navigation Equipment

NAICS

Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing (334511), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Search, Detection, Navagation, Guidance, Aeronautical Sys (3812)

akta.pro primary industry

Life-Saving Appliances & Safety Equipment (Davit Systems, Lifeboats, Firefighting) (IMAJAIAG)

Keywords

• Marine navigation buoys
• Aids-to-navigation equipment
• Oceanographic monitoring buoys
• Marine lighthouse systems
• AIS transponders

Headquarters

HQ city

Ikeda

HQ country

Japan

HQ region

Asia

Offices9 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Marine Buoy and Navigational Aid Hardware Sales: Direct sales of manufactured buoys (lighted buoys, unlighted buoys, spar buoys, mooring buoys, plastic buoys, rescue buoys) and navigational aids (lighthouses, light beacons, sector lights, leading lights, bridge lights, lanterns). Products range from small portable buoys (~2kg) to large steel buoys (~11 tonnes). Revenue is generated from product sales, with customization based on site conditions and specifications.
2. Observation/Monitoring Buoy Systems: Sale of observation buoy systems configured for specific purposes — water temperature, current, wave, water quality, oil slick, meteorological monitoring. Systems include sensors, communication devices, power supplies, lanterns, and mooring systems. Real-time data transmitted to customers' PCs or smartphones.
3. AIS Transponder Sales: Sales of AIS (Automatic Identification System) transponders including Class B AIS ZSA series and AtoN AIS Akari series for navigational aid applications.
4. Parts and Components: Sales of replacement and spare parts including LED lanterns, solar panels, charging controllers, power control panels, radar reflectors, top marks, synchronization systems, and monitoring systems.
5. Rescue and Disaster Prevention Products: Sales of rescue and disaster prevention products including Zeni Post water rescue tool storage facilities, Zeni Panel surface-emitting signs, LED guide lights (Sign Marker), solar-powered LED lighting, and non-slip ladders.
6. Engineering, Technical Consulting, and Maintenance Services: Technical consulting for buoy system design, installation, and ongoing maintenance. Regular inspection services offered for navigational buoys and monitoring systems. Design and consulting services for mooring methods, buoy selection, and sensor configuration.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels4 records

Core offering

Zeni Lite Buoy manufactures and sells marine aids-to-navigation equipment including lighted and unlighted buoys (small, medium, standard ZLB, high-wave ZWB, swift-current ZCB, spar ZSB, plastic ZPB, mooring, slider, and rescue buoys), lighthouses, light beacons, LED lanterns, range/sector lights, bridge lights, and Class B AIS transponders. It also produces observation and monitoring buoy systems configured for water temperature, current, wave, water quality, oil slick, and meteorological monitoring, with integrated sensors, solar power, GPS synchronization, and satellite/LTE/AIS communication for real-time data transmission to onshore systems.

Product overview

Zeni Lite Buoy is a comprehensive maritime buoy and navigation aid platform built around specialized buoy platforms (small, medium, standard, high-wave, swift-current, spar, plastic, slider, and rescue types) combined with a modular system of LED lanterns (ZL-LS115, CLIO, ZL-LS160, ZL-LS370, ZL-LS570 series), AIS transponders (Class B ZSA and AtoN AIS Akari series), monitoring and observation equipment (compact GPS wave buoys, water quality/current/temperature buoys, drifting buoys), and power/accessory components (solar panels, charging controllers, synchronization devices, lantern monitoring systems). These products share common platform technologies: LED solar-powered lanterns, GPS/GNSS positioning, satellite/LTE/LPWA communication, and AIS networking, enabling configurations from basic navigation marking to fully instrumented autonomous ocean observation systems.

Differentiator

Problem solved

Functional benefit

Brands

• Akari: AtoN AIS (Aid to Navigation Automatic Identification System) product line for maritime navigation aids, including Akari-1S, Akari-3S models with monitoring and sensor capabilities.
• Zeni Post (ゼニポスト)
• Zeni Panel (ゼニパネル)
• Sign Marker (サインマーカー)
• Zeni Hi Spar (ZSB) - ゼニハイスパーブイ
• ZeniHotaru (ゼニホタル)

Products and services

• Small Lighted Buoy Series Lightweight aluminum and polyethylene buoys using maintenance-free LED lanterns powered by solar cells. Multiple models including 10-PS, 15-P, 20-P, 5-A, HandyBuoy, High-Pressure Buoy, and ZeniHotaru. For harbor and calm-water navigation marking.
• Medium Lighted Buoy Series Corrosion-resistant aluminum buoys with higher focal plane heights and longer luminous ranges. Seven models (Type 3, 3HG, Type 5, 5HG, 104, 105D, 140P) with LED solar cell systems. For channel and harbor marking.
• ZLB Series Standard Lighted Buoys Steel-channel buoys with internationally common shapes for marking main navigation channels for large vessels. Six models (ZLB-180 to ZLB-320), solar-powered, focal plane heights 2.8–6.0m, masses 2.0–11.0 tonnes.
• ZWB Series High Wave Lighted Buoys Lighted buoys specially designed for high-wave seas with enhanced wave resistance and vibration damping. Seven models (ZWB-120S to ZWB-250), focal plane heights 0.9–5.6m, masses 460–3,400kg. Withstand wave heights up to 15m.
• ZCB Series Swift Current Lighted Buoys Lighted buoys designed for fast-tidal-current seas with minimized tilt and drift distance. Three models (ZCB-350D, ZCB-501D, ZCB-603D), focal plane heights 3.7–6.2m, float diameters 3.5–6.0m, masses 5.0–5.7 tonnes. Patented in 10 countries.
• ZSB Series Zeni Hi Spar Buoys Spar buoys designed to eliminate swinging and tilting, functioning like fixed towers at channel entrances. Six models from shallow-water (0.7t) to large-scale (19.5t) with focal plane heights up to 10.9m. Includes attitude-stabilized spar buoy for offshore wind farm wind observation.
• Marker Buoys and ZUB Series Unlighted Buoys Unlighted marker buoys for daytime/leisure use (Z-type, Y-type, ϕ600, ϕ800) and robust unlighted buoys for harbor/lake/river daytime marking (ZUB series models UB-10A1 through ZUB-180N, in green/red colors).
• Mooring Buoy Series Mooring buoys designed for vessels with specifications determined by vessel size and marine conditions. Polyfloat (2-stage, 3-stage) ring and hook types, and steel buoys with towing capacities 98kN to 1,372kN.
• ZPB Series Plastic Buoys Lightweight, cost-effective plastic buoys for navigation channel and construction zone marking and metocean observation. Field-assemblable split-structure design for easy storage and transport. Includes shallow-water spar, polyfloat spar, ZPB-260P, and ZPB-300P.
• Slider Buoy System High-value-added mooring system combining spar and free-floating buoy advantages. Mooring chain slides inside an underwater spar pipe, minimizing swing radius, keeping focal plane height constant, and reducing tilt in tidal currents.
• Rescue and Disaster Prevention Products Rescue and disaster-prevention products including droppable rescue buoys, ZeniPost water rescue tool storage with seven lifesaving tools, ZeniPanel surface-emitting signs, SignMarker LED induction lights, solar-powered LED lighting, and non-slip ladders.
• Aluminum Lighthouse Series Aluminum lighthouses for domestic and international use, lightweight for easy installation, corrosion-resistant, with lightning protection via high electrical conductivity. Four models: 6m (1.1t), 8m (2.0t), 10m (2.0t), and modular 10m (1.7t).
• Small Light Beacon Series Compact LED light beacons for marking breakwaters, caissons, survey platforms, water intakes, fishing grounds, and aquaculture farms. Eleven models (B-1 through RAKKO II) with focal plane heights 0.29–1.37m, masses 0.1–7.0kg, solar or battery powered.
• Pole-type Light Beacon Series Pole-mounted light beacons for alerting vessels near breakwaters and harbor structures. Straight, stepped-pole, and tapered types in heights 1–5m (focal plane heights 1.3–5.3m), masses 43–210kg, aluminum or steel construction.
• Leading Lights / Range Lights Paired front (low) and rear (high) towers installed on land along navigation route extensions to mark safe passage through difficult waterways and narrow harbor entrances. Vessels navigate by keeping front and rear lights aligned vertically.
• Sector Lights Three-color beam directional lights with simple structure, high reliability, and easy maintenance. Emit high-precision horizontal beams to display clear safety lines for navigation channels, fishing zones, and construction zones.
• Separate Lights Lights for guiding vessels around narrow channels, submerged breakwaters, shallow areas, aquaculture facilities, and fishery boundaries. Multiple units can be installed to expand applications.
• Irradiation Lights Custom-designed LED irradiation/range lights for illuminating offshore obstacles such as reefs. Configurable luminous intensity, beam divergence, and range up to 20 nautical miles. Support for flasher and GPS-synchronized flashing.
• Navigation Signal Lights Flash signal lights for harbor control operations, allowing security personnel to remotely operate and monitor signal lights from remote locations. Supports multiple flash patterns with automatic/manual daylight dimming.
• LED Lanterns (ZL-LS115, CLIO, ZL-LS160, ZL-LS370, ZL-LS570, ZL-LSRB) LED lanterns for navigation buoys, light beacons, and lighthouses, ranging from short-range (ZL-LS115, 1–3 NM) to long-range (ZL-LS570 up to 20 NM, ZL-LSRB rotating beacon up to 23 NM). Available with built-in synchronization, fixed-and-flashing mode, explosion-proof variants.
• Bridge Lights and Pier Lights Navigation lights for vessels under bridges, including rotating, counterweighted, and sliding bridge light types, with bridge markers (left, center, right). Pier illumination lights for nighttime aesthetic lighting. Uses ZL-LSW160D and ZL-LS370B lanterns.
• Berth Approach Lights Standardized berth approach lights for safe nighttime vessel docking, with dual-color beam (horizontal yellow, vertical red) for distance perception. Solar-powered for independent operation on existing quays.
• Class B AIS ZSA Series (ZSA-2000, ZSA-1000) Compact, low-cost Class B AIS transponders compliant with ITU and IEC international standards. Waterproof construction, built-in GPS antenna, and NMEA interface for connection to GPS plotters and computers.
• AtoN AIS Akari Series (Akari-1S, Akari-3S, Akari-DIU) World's first AtoN AIS device (announced 2002), compliant with IEC 62320. Akari-3S includes lantern monitoring, power monitoring, and meteorological/oceanographic sensor data transmission via AIS network. Akari-AWS provides automatic weather station observations via AIS.
• Monitoring Buoys (Metocean Observation) Comprehensive monitoring buoy lineup for metocean observation including water temperature buoys, GPS wave measurement buoys, thermal discharge monitoring, met/hydro monitoring, oil slick monitoring (laser/electrode/UV fluorescence), water quality buoys, harbor current monitoring, dam/lake monitoring. Communication via LTE, LPWA, Iridium, or Globalstar satellite.
• Compact GPS Wave Measurement Buoy Lightweight (35kg, 800mm diameter) drifting buoy using single-point GPS for high-accuracy wave measurement (height ±10cm, direction ±5°). Achieves accuracy comparable to ultrasonic and accelerometer sensors. Real-time transmission via LTE or Iridium. Patent technology developed with JAXA.
• Small Monitoring Buoys (ϕ0.5m and ϕ1.0m) Compact monitoring buoys based on the 10-PS lighted buoy platform. ϕ0.5m for coastal/fisheries use (up to 3-layer water temperature, current, chlorophyll, salinity); ϕ1.0m for offshore use with 5+ year durability. LTE communication with autonomous operation up to 1 year.
• Drifting Buoys (Globalstar and Iridium)

Quantifiable outcome

• Buoys can withstand wave heights up to 15 meters in extreme wave conditions
• +4 more outcomes

Named customers9 records

Segments6 records

Ideal customer profiles7 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

AI capability2 records

Feature7 records

Partnerships

Six partnerships are on record, tiered significant, core and minor.

• NEDO (New Energy and Industrial Technology Development Organization)significantStrategic or Co-development Partner · 1 January 2013NEDO commissioned project for development of 'Attitude Stabilization Device-Equipped Spar Buoy' for offshore wind farm wind observation. Project adopted in fiscal year 2013. Developed spar buoy with small Doppler lidar for wind observation as replacement for fixed observation towers, reducing survey costs and construction time. Three-year development period leading to practical implementation.
• Zeniya Aluminum Engineering Co., Ltd. (錢屋アルミニウム製作所)coreOthersParent/group company. Principal operations: electrical machine components, vehicle parts, construction materials, IT parts, housing products, light buoys, navigational lights, environmental observation systems, bridge lights. Handles recruitment for Zeni Lite Buoy. Co-located headquarters in Ikeda City, Osaka.
• Zeniya Marine Service Co., Ltd. (ゼニヤ海洋サービス株式会社)coreOthersGroup company specializing in floating pontoon, fishing net systems, and other floating system planning, design, construction, and maintenance. Offices in Tokyo, Osaka, and Kyushu. Provides complementary marine infrastructure services.
• Zeniya Thailand Co., Ltd. (ゼニヤタイランド株式会社)minorOthersOverseas group company located in Chonburi, Thailand. Manufacturing operations supporting regional production and supply chain.
• Zeniya Hong Kong Ltd. (錢屋香港有限公司)minorOthersOverseas group company in Hong Kong, Kowloon. Supports regional sales and distribution activities.
• Chientai Hong Kong Ltd. (錢大香港有限公司)minorOthersOverseas group company in Hong Kong. Part of Zeniya group international network.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Regional players

• Japan Radio Co. (JRC): Japanese marine electronics OEM producing navigation radars, AIS, and ECDIS for commercial vessels. Same Japanese maritime customer base as ZENI but focused on shipboard electronics rather than physical AtoN infrastructure.
• JFE Advantech: Japanese environmental monitoring instrument maker covering water quality and process monitoring. Comparable in Japanese-domestic water-quality monitoring sensor business; complementary rather than head-to-head in marine buoys.

Broad incumbents

• Fugro: Dutch geo-data specialist with offshore site characterization and metocean monitoring services. Competes with ZENI in offshore wind survey applications but from a services rather than hardware-vendor position.
• Kongsberg Maritime: Norwegian marine technology incumbent offering navigation, automation, and offshore/subsea systems. Larger portfolio player with overlapping smart-buoy and metocean monitoring capabilities.

Direct peers

• Tideland Signal: US-headquartered (Houston) AtoN specialist producing navigation buoys, lanterns, racons, and integrated AtoN power systems for ports and coast guards worldwide — directly competes in ZENI's core navigation-aid category.
• Sealite (Star2M / SPX): Australia-origin global manufacturer of marine aids-to-navigation buoys, LED lanterns, and AtoN AIS transponders. Closest like-for-like competitor to ZENI across lighted buoys, mooring buoys, and integrated AtoN platforms.
• AXYS Technologies (Axys Technologies Inc.): Canadian manufacturer of metocean monitoring buoys (TRIAXYS wave buoys, WatchKeeper buoys). Closely comparable to ZENI's monitoring buoy business in GPS wave measurement and offshore observation.
• Carmanah Technologies: Canadian manufacturer of solar-powered marine lanterns, AtoN equipment, and offshore lighting. Direct peer in self-contained solar LED lantern and lighted buoy product lines.
• OSIL (Ocean Scientific International Ltd): UK-based manufacturer of oceanographic and environmental monitoring buoys and platforms. Comparable to ZENI's water-quality, current, and metocean observation buoy lines.
• Sabik Marine: Finnish AtoN lantern and remote monitoring specialist, part of the Carmanah group. Competes with ZENI's ZL-LS lantern family and Akari AtoN AIS system in international tenders.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries4 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 Zeni Lite Buoy