What AOI Co. does

AOI Co., Ltd. (株式会社アオイ) is a privately held Japanese manufacturer of fluid control equipment, founded in 1968 in Gotemba City, Shizuoka Prefecture, and family-controlled by the Onoda family. The company designs, manufactures, and sells fittings (joints), valves, and plastic tubes used in factory automation, pneumatic systems, and industrial fluid handling. Its product portfolio spans stainless steel fittings (es-fit, LS-fit, AW/BW W-Interlock compression type, BE-fit), brass fittings (M-type, R-type, Z-JOINT one-touch), PEEK resin fittings (PS-fit), quick couplings, check valves, speed controllers, needle valves, and miniature fittings, alongside a broad tube line including nylon, polyurethane, biomass, eco-friendly, gas barrier, fluorine, flame-retardant, multi-core, and coil/bend variants. All products are RoHS compliant, and the company holds ISO 9001 and ISO 14001 certifications.

The company operates through a group structure with a parent (AOI Co., 137 employees), two domestic sales subsidiaries (AOI Koohan Co., Ltd.; AOI Asse Co., Ltd., combined 65 employees), and overseas entities in China (Aoaoyi Trading Dalian) and Thailand (J-AOI CO., LTD.), reaching a group headcount of 202 as of September 2024. Revenue is generated through B2B direct sales of industrial components to manufacturing customers, with eight regional sales offices across Japan and a complementary authorized dealership of CKD Corporation pneumatic products. Pricing is not publicly disclosed and the company operates a hardware sales model without subscription, service, or licensing revenue streams. Marketing is conducted through catalog PDFs, CAD data downloads, trade shows, and product demonstration videos.

Name

AOI Co.

Legal name

株式会社アオイ (AOI Co., Ltd.)

Website

https://aoi-inc.co.jp

Company type

Private

Founded year

1968

Operating status

Operating

Headcount range

1–10 employees

Short description

AOI Co., Ltd. is a Japanese manufacturer founded in 1968 that designs, produces, and sells fittings, valves, and plastic tubes for industrial fluid control applications, serving factory automation, automotive, cleanroom, and pneumatic equipment customers across Japan, China, and Thailand.

Ownership category

akta.pro rank

Product category

Industrial Fluid Control Equipment

NAICS

Fluid Power Valve and Hose Fitting Manufacturing (332912)

SIC

Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050)

akta.pro primary industry

Hoses, Tubing & Fittings (Hydraulic/Pneumatic Lines & Connectors) (IMAHAGAH)

akta.pro secondary industry

Pneumatic Components (FRLs, Cylinders, Valves) (IMAHAGAC)

Keywords

• Industrial fluid control equipment
• Pneumatic fittings
• Plastic tubes
• Compression fittings
• One-touch connectors

Headquarters

HQ city

Gotemba

HQ country

Japan

HQ region

Asia

Offices12 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. 流体制御機器製品の製造販売: ，流体制御機器（バルブ・継手・プラスチックチューブ）の設計・開発・製造 및 판매를于一体的的事业模式。产品全部符合RoHS规格，满足国内外制造业的需求。

Go-to-market motion2 records

Distribution channels5 records

Marketing channels2 records

Core offering

AOI Co., Ltd. (株式会社アオイ) researches, develops, manufactures, and sells fluid control equipment - specifically pneumatic plastic tubes (nylon, polyurethane, fluorine, eco/biomass), compression fittings (stainless steel, brass, PEEK resin), one-touch fittings and couplings, check valves, speed controllers, and needle valves. The offering targets industrial manufacturers and automation users across factory automation, semiconductor, food/pharmaceutical packaging, and cleanroom/water-purification applications. All products are RoHS-compliant and manufactured at the Gotemba headquarters, with distribution through a nationwide sales subsidiary network and group entities in China and Thailand.

Product overview

AOI Co. is a Japanese manufacturer of fluid control equipment specializing in valves, fittings, and plastic tubes for industrial applications. The product portfolio consists of two main categories: Joint (継手) fittings and Tube (チューブ) products. The fittings category includes stainless steel fittings (es-fit, LS-fit, AW, BE-fit), brass fittings (BW, M-type, R-type), PEEK resin fittings (PS-fit), stainless couplings (COUPLE.A), check valves (CVB/CVH), speed controllers (SCS, SCZ/SCM/SCU), needle valves (RNAW/DAVS), miniature fittings, and one-touch fittings (Z-JOINT, Mini-lock, ZA, US). The tube category spans nylon tubes (AX-1200 amid-flex, F-1500 super-flex, AX-1200-NP high-pressure), polyurethane tubes (U-9500, U-9200, BPU/BPUE biomass, ARU abrasion-resistant), eco tubes (ecos, ecoh, ecoh(wr)), gas barrier tubes (HGB, HGBF), fluorine tubes (REF5 multi-layer, FES flexible, FE), flame-retardant tubes (SR2, SWF extreme environment, NHPU/NHPF non-halogen), multi-core tubes (PX/PF control, UF/ARUF flat), and specialty tubes (PET robot air, UK/KX coil). All products are RoHS-compliant. The company also offers CAD data downloads and targets industrial automation, pneumatic, water, oil, chemical, and cleanroom applications.

Differentiator

Problem solved

Functional benefit

Brands

• AOI Group: Corporate group brand encompassing株式会社アオイ and its subsidiaries

Products and services

• es-fit (Stainless steel compression fitting) Stainless steel (SUS316) fitting with smooth inner diameter and corrosion resistance, featuring one-touch connection for industrial pneumatic/fluid piping.
• LS-fit (Stainless steel fitting with Easy Fit mechanism) Stainless steel fitting with integrated nut-sleeve Easy Fit mechanism for improved work efficiency; proprietary sleeve design prevents tube twisting during piping.
• BE-fit (Blade hose fitting) Blade hose fitting available in stainless steel and brass models with chuck mechanism for secure hose retention and integrated sleeve-chuck-nut structure.
• AW (W-INTERLOCK stainless steel compression fitting) W-INTERLOCK type compression fitting designed for stainless steel pipes (SUS304TP, SUS316TP), suitable for high pressure, high/low temperature environments, resistant to shock and vibration.
• BW (W-INTERLOCK brass compression fitting) W-INTERLOCK brass compression fitting for copper pipes offering reliable sealing under high pressure, temperature, and vacuum conditions.
• M-type (Double-touch brass fitting) Double-touch brass fitting for plastic tubes and copper pipes with uniform sleeve compression for reliable sealing.
• R-type (Resin sleeve insert fitting) Resin sleeve insert fitting providing stable airtight sealing for liquids with low tightening torque and PTFE-coated threads.
• PS-fit (PEEK resin fitting) PEEK resin fitting offering improved work efficiency, excellent flow characteristics, and lightweight construction for air, water, oil, paint, ink, and solvent applications.
• STAINLESS COUPLE.A (Stainless quick coupling) Stainless steel quick coupling with leak-free seal mechanism for connection and disconnection.
• CVB / CVH (Stainless check valves) Stainless steel check valves (CVB with integrated packing-valve body, CVH with metal seal) for stable sealing and chemical resistance.
• SCS (Stainless speed controller) Stainless steel speed controller with excellent flow characteristics, corrosion resistance, and chemical resistance for flow regulation.
• SCZ / SCM / SCU (Resin speed controllers) White flame-retardant resin speed controllers with tool-free one-touch fittings, meter-out and meter-in control options, available in standard, compact, and universal types.
• RNAW / DAVS (Stainless needle valves) Stainless steel needle valves (RNAW) and low-flow needle valves (DAVS) with lock mechanism for precise flow control.
• Miniature fitting series Stainless steel (SUS316 with PTFE packing) miniature fittings for compact-space applications; includes universal elbow, universal tee, L-union, and plug configurations.
• Z-JOINT (Brass one-touch fitting) Brass one-touch fitting using cadmium-regulated materials (75ppm or less), available in union, elbow, tee, and manifold variants.
• Mini-Lock (Compact brass one-touch fitting) Compact one-touch brass fitting achieving 20% reduction in outer diameter and 30% reduction in length, with flame-retardant resin and electroless nickel plating.
• ZA (Stainless one-touch joint) Stainless steel (SUS304) one-touch joint with flame-retardant PBT resin (UL94 V-0 equivalent), available in multiple configurations.
• US (All-stainless one-touch joint) Full stainless steel (SUS316) one-touch joint significantly reducing piping space, suitable for air and water applications.
• AQ Valve (Air operation valve) Air operation valve with straight flow path, white flame-retardant resin body, manifold-compatible bracket for 2-port and 3-port configurations.
• AX-1200 Amid-flex nylon tube Nylon tube using castor-derived polyamide 11 (amid-flex), 70% biomass material, with heat/cold resistance (-40°C to +100°C), chemical resistance especially to oil and gasoline, and high pressure capability.
• F-1500 Super-flex nylon tube Flexible nylon tube with superior flexibility versus standard nylon, designed for narrow spaces and complex piping layouts.
• AX-1200-NP High-pressure nylon tube High-pressure nylon tube for applications requiring higher pressure ratings; available in transparent and colored options.
• U-9500 U-Flex polyurethane tube Ether-based polyurethane tube with excellent water resistance, flexibility, abrasion resistance, and cold resistance down to -40°C.
• U-9200 Soft polyurethane tube Soft ether-based polyurethane (TPU) tube enabling more compact piping than U-Flex.
• BPU / BPUE Biomass polyurethane tube Biomass-based polyurethane tubes with 40% (BPU) or 15% (BPUE) biomass raw material content, reducing manufacturing CO2 emissions by approximately 1.7kg or 0.76kg per kg of TPU respectively.
• ARU Abrasion-resistant polyurethane tube Polyurethane tube with 5x greater abrasion resistance than standard soft polyurethane tube, featuring a matte finish for reduced friction.
• ecos / ecoh Eco-flex tubes Eco-friendly tubes (soft type, flexible type, high-pressure type) producing only CO2 at 750°C incineration with no dioxin generation; non-bleeding for cleanroom and pure water piping.
• HGB / HGBF Gas barrier tubes Hybrid gas barrier tubes with oxygen permeability 1/3 of PVDC; HGB uses anti-static resin layers, HGBF adds inner fluorine layer for chemical resistance.
• REF5 / REF5AS / REF5UV Multi-layer fluorine tubes Multi-layer fluorine tube with outer soft nylon (65% biomass) and inner FEP chemical barrier; variants include anti-static (REF5AS) and UV-blocking (REF5UV) for moving-part piping.
• FES Flexible PTFE tube Flexible PTFE tube difficult to bend and break, suitable for narrow spaces, with high chemical resistance, transparency, and flame-retardancy (UL94 V-0 equivalent).
• FE FEP fluorine resin tube FEP fluorine resin tube with heat resistance (+200°C to -65°C), chemical resistance, weather resistance, and inert smooth inner surface.
• SR2 Flame-retardant single-core tube Flame-retardant single-core tube using UL94V-0 certified material, preventing continued burning after exposure to welding sparks, with no plasticizer for durability.
• SWF Extreme environment tube Extreme environment tube with silicone/flexible copper braid outer layer and PTFE inner tube, operating from -20°C to +250°C with solvent resistance.
• NHPU / NHPF Non-halogen, non-phosphorus flame-retardant tubes Non-halogen, non-phosphorus flame-retardant tubes with inner biomass polyurethane (NHPU) or biomass nylon (NHPF), producing no toxic gases when burning.
• PX / PF Multi-core control tubes Multi-core control tubes with PVC outer jacket protecting inner nylon tubes, available up to 7 cores for outdoor and impact-exposed piping.
• UF / ARUF Flat tubes Parallel-welded flat polyurethane tubes with flexibility and abrasion resistance for moving-part piping; separable tubes for fitting connection.
• PET (D63) Robot air tube Polyether ester robot air tube with excellent flex fatigue and abrasion resistance, featuring matte finish for reduced friction in moving/sliding applications.
• UK / KX Coil/bending tubes Coil/crank tubes (UK from U-Flex, KX from amid-flex biomass) for flexible piping with excellent restoration force.
• SX Spiral tube Spiral tube for protection and bundling of plastic tubes and wires.
• Tube accessories (GW guard wire, AZ/KR tube cutters, TK tube holders) Accessories including guard wires for tube bending points, tube cutters (AZ-1200 pocket, KR-1 nipper, KR-20 for fiber-reinforced hoses up to 20mm), and TK tube holders for aligning and beautifying piping.
• CAD data download service 2D (DXF) and 3D (IGES, STEP) CAD data available for free download for fitting products (es-fit, AW, BW, M-type, COUPLE.A, SCS, RNAW, Z-JOINT, US, SCZ) for engineering design and integration.

Quantifiable outcome

• BPU バイオ mass urethane tube：製造時のCO2排出量を約1.7 kg/TPU1kg 削減（参考値）
• +1 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Five partnerships are on record, tiered minor and core.

• J-AOI CO.,LTD.（タイ）minorChannel Partner/ Reseller/ Distributor · 1 October 2005タイに設立された株式会社アオイの関連会社。東南アジア域内の製造業用户への販売活動を展開。
• 阿奥依貿易（大連）有限公司minorChannel Partner/ Reseller/ Distributor · 1 January 2003中国大連保税区に所在する現地法人。空圧機器部品・空圧機器製品の販売を行う。注册资本50,000 USD。株式会社アオイの関連会社。
• 株式会社アッセminorChannel Partner/ Reseller/ Distributor · 1 April 1996流体・空圧機器メーカー株式会社アオイ製品の销售を行うグループ企業。静岡県沼津市・东京都品川区に拠点。注册资本金1,000万円、从业人员3名（2024年9月在）。
• アオイ工販株式会社coreChannel Partner/ Reseller/ Distributor · 1 November 1982株式会社アオイの製品を中心とした関連商品の販売を行うグループ企業。東京都品川区に本社を置き、全国に横浜・厚木・沼津・名古屋・大阪・神戸・京都・福岡に营业部を置く。CKD株式会社の正規代理店也是。注册资本金5,000万円、从业人员62名（2024年9月在）。株式会社アオイが亲会社。
• CKD株式会社minorChannel Partner/ Reseller/ Distributor · 1 November 1982CKD株式会社の空圧機器正規代理店として、グループ企业アオイ工販株式会社を通じて补完的商品を提供。CKD株式会社の製品が补充品として位置づけられる。

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Market position

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

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 AOI Co.