What Yokota Manufacturing does

Yokota Manufacturing (株式会社横田製作所) is a Hiroshima-based Japanese industrial equipment manufacturer specializing in custom-engineered pumps and valves for water and fluid control applications. Founded in 1948 as Yokota Pump Research Institute and incorporated in 1953, the company is publicly listed on the Tokyo Stock Exchange Standard Market under ticker 6248 with 85 employees and registered capital of 130,583,200 yen. It maintains complete in-house manufacturing from metal casting through machining, assembly, testing, and shipping at a single Hiroshima headquarters.

The company's product portfolio centers on three technology pillars: (1) self-priming pumps (UHN, ES, UB, UTX, USM/UBM/MEF series) built on a patented air-water separation mechanism achieving 60-90 kPa negative pressure; (2) water hammer prevention check valves (SL series) with flow-responsive instant closure; and (3) the proprietary YST series of corrosion/abrasion/seawater-resistant stainless steel alloys developed in-house over 30+ years (YST130A, YST130C, YST130N, YST130S, plus YHC22 Hastelloy-equivalent). The portfolio also includes super self-priming pumps with gas-liquid separation impellers (UPM/UPS), multi-stage centrifugal pumps with floating-disc self-balancing, defoaming/deaeration pumps (DP), large mixed flow pumps (YM), and pilot-operated pressure/flow/level control valves. The company holds approximately 200 industrial property rights including international patents.

Yokota operates a direct field sales model with no third-party distribution, organized into Hiroshima headquarters sales, Tokyo branch sales (relocated to Shinjuku in 2019), and an overseas sales team covering approximately 30 countries. Customers span government/public water infrastructure, heavy industry (power plants, steel mills, chemical/refinery), food and pharmaceutical processing, aquariums, semiconductor plants, and large-scale civil engineering. All products are custom-manufactured to specification under a quote-based pricing model. Reported fiscal-year revenue has been approximately 13-16 billion yen in recent years, with a dip in 2022-2023 followed by recovery in 2024-2025.

Name

Yokota Manufacturing

Legal name

株式会社横田製作所

Website

https://aquadevice.com

Company type

Public

Founded year

1948

Operating status

Operating

Headcount range

51–100 employees

Short description

Yokota Manufacturing (株式会社横田製作所) is a Japanese custom-engineered industrial pump and valve manufacturer serving government water infrastructure, heavy industry, food processing, and aquariums with proprietary self-priming, water hammer prevention, and YST stainless steel technologies, exporting to ~30 countries from its Hiroshima base.

Ownership category

akta.pro rank

Product category

Industrial Pumps and Valves

NAICS

Pump and Compressor Manufacturing (33391), Measuring, Dispensing, and Other Pumping Equipment Manufacturing (333914), Other General Purpose Machinery Manufacturing (3339)

SIC

Pumps & Pumping Equipment (3561)

akta.pro primary industry

Centrifugal Pumps (IMAHANAA)

akta.pro secondary industries

Specialty & Metering Pumps (IMAHANAC), Pump & Compressor Packages (Skids, Booster Sets) (IMAHANAG)

Keywords

• Industrial pump manufacturing
• Fluid control valves
• Self-priming pumps
• Stainless steel castings
• Water hammer prevention

Headquarters

HQ city

Hiroshima

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Pump Sales: Sale of custom-manufactured industrial pumps including self-priming涡巻 pumps, multi-stage centrifugal pumps, large-scale diagonal flow pumps, process pumps, and defoaming/deaeration pumps. Products are fully customized to customer specifications based on application requirements.
2. Valve Sales: Sale of industrial valves including water hammer prevention check valves (SL series), wafer check valves, direct-acting and pilot-operated flow control valves, pressure control valves, and level control valves. Valves are sold alongside pumps as part of integrated fluid management solutions.
3. After-Sales Service and Maintenance: Maintenance, repair, and parts supply services for installed equipment. After-sales support and maintenance services are referenced as part of the sales process and customer engagement.
4. Engineering and Installation Services: Mechanical equipment installation and pipework construction services (機械器具設置工事, 管工事) are listed as service offerings, indicating project-based engineering services alongside product sales.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels3 records

Core offering

Yokota Manufacturing designs, casts, and assembles custom-engineered industrial pumps (self-priming, centrifugal, multi-stage, mixed-flow, deaeration) and valves (check valves, flow, pressure, and level control valves) for water and fluid management. Production runs in-house from metal casting through machining, assembly, testing, and shipping, using proprietary YST stainless steel alloys. Target applications include municipal water and sewage infrastructure, power generation, steel mills, food and chemical processing, aquariums, and subsea tunnels.

Product overview

Yokota Manufacturing (株式会社横田製作所) is a specialized industrial equipment manufacturer offering a comprehensive portfolio of custom-engineered pumps and valves for water and fluid control applications. The product lineup centers on self-priming pumps (UHN, ES, UB, UTX, USM/UBM/MEF series) utilizing proprietary air-water separation mechanisms with international patents, super self-priming pumps (UPM/UPS) combining gas-liquid separation impellers with vacuum pumps, deaeration/degasification pumps (DP) for removing dissolved gases, and general-purpose volute pumps (UEN, UBO, HD, MCF/MCH, YM) covering various flow and head requirements. The valve portfolio includes non-water-hammer check valves (SL series), wafer check valves (SL-SW/SF), and pilot-operated/direct-acting control valves for flow, pressure, and liquid level regulation (UFS/UFT/UFF/UFN, UFSF-C, UFSB-1W, UFSP, UFSA). A key differentiator is the company's proprietary YST stainless steel series developed in-house for corrosion and wear resistance in demanding applications. All products are manufactured through complete in-house production from casting to assembly, enabling customization for specialized applications across aquaculture,水族館 (aquariums),海底トンネル (subsea tunnels), power plants, food processing, and chemical industries.

Differentiator

Problem solved

Functional benefit

Brands

• YST シリーズ: 自社開発のステンレス鋼シリーズ。耐食性および耐摩耗性に優れ、ポンプ・バルブ製品の材質として広く採用されている。
• YST130A
• YST130C
• YST130N
• YST130S
• YHC22

Products and services

• Deaeration/Degasification Pump DP (脱泡・脱気ポンプ DP) Specialized pump that removes dissolved gases and bubbles from liquids, used in food, beverage, pharmaceutical, and chemical industries to prevent oxidation and maintain product quality.
• Self-Priming Volute Pump UHN (自吸渦巻ポンプ UHN) Self-priming volute pump with proprietary air-water separation mechanism for liquid containing gases, slurry, and applications requiring suction from difficult positions.
• Self-Priming Volute Pump ES (自吸渦巻ポンプ ES) High-performance self-priming pump with vacuum pump-level vacuum degree and short priming time, using proprietary air-water separation mechanism.
• Self-Priming Process Pump UB (自吸プロセスポンプ UB) Back-pull-out type self-priming process pump suitable for corrosive liquids, slurries, and applications requiring suction from difficult positions.
• Self-Priming Cascade Pump UTX (自吸カスケードポンプ UTX) Semi-double volute self-priming cascade pump with international patent air-water separation mechanism achieving 60-90 kPa negative pressure, capable of deep suction and gas-liquid two-phase operation.
• Super Self-Priming Pump UPM/UPS (超自吸ポンプ UPM/UPS) Super self-priming pump combining a gas-liquid separation impeller with a vacuum pump for handling sludge, bubble-containing, and solid-containing liquids in food, chemical, tanker cargo, and civil engineering applications.
• Self-Priming Multi-Stage Volute Pump USM/UBM/MEF (自吸多段渦巻ポンプ) High-head self-priming multi-stage pump with proprietary air-water separation mechanism and self-balancing mechanism, achieving 60-80 kPa negative pressure with ball bearings for easier maintenance.
• Single Suction Volute Pump UEN (片吸込渦巻ポンプ UEN) Versatile single suction volute pump with 55 model variants covering diverse specifications and offering abundant material options for varying operating conditions.
• Process Pump UBO (プロセスポンプ UBO) Back-pull-out type process pump for petroleum, chemical, food, and power industries, handling acidic, alkaline, solvent, and slurry-containing liquids.
• Large Mixed Flow Pump YM (大型斜流ポンプ YM) Large-capacity single-stage mixed flow pump with semi-open impeller for flue gas desulfurization, seawater intake/discharge, and industrial water applications.
• Double Suction Volute Pump HD (両吸込渦巻ポンプ HD) Double suction volute pump with self-priming capability, high efficiency, and low NPSH, designed for seawater intake systems and corrosive liquid applications.
• Multi-Stage Volute Pump MCF/MCH (多段渦巻ポンプ) High-head multi-stage volute pump with proprietary floating disc self-balancing mechanism, using ball bearings for easy disassembly and reassembly in high-rise water supply and boiler feedwater service.
• Non-Water-Hammer Check Valve SL (無水撃チェッキ弁 SL) Patented check valve that responds instantaneously to flow changes, eliminating closure delay and preventing water hammer; used in iron/steel mills and water treatment.
• Wafer Check Valve SL-SW/SF (ウエハーチェッキ弁) Single-disc wafer-style check valve with patented adjustable closure speed mechanism for pure water, seawater, sewage, and chemical service.
• Direct-Acting Flow Control Valve UFS/UFT/UFF/UFN (直動式流量制御弁) Variable constant-flow control valve with proprietary structure maintaining flow independent of inlet pressure fluctuations, for agricultural and industrial water supply.
• Direct-Acting Float Valve UFSF-C (直動式液面制御弁) Compact float-operated liquid level control valve with proprietary balance mechanism, combining level control and constant-flow functions for farm ponds and reservoirs.
• Pilot-Operated Float Valve UFSB-1W (パイロット式液面制御弁) Pilot-operated liquid level control valve with ball tap mechanism for farm ponds, storage tanks, and elevated tanks.
• Pilot-Operated Pressure Reducing Valve UFSP (パイロット式圧力制御弁) Secondary pressure control valve with complete shutoff capability and pilot-maintained secondary pressure setpoint.
• Pilot-Operated Pressure Control Valve UFSA (パイロット式圧力制御弁) Primary pressure control valve with rapid response to inlet pressure increases and integrated safety valve function for accurate pressure regulation.
• YST Series Special Stainless Steel Alloys (YSTシリーズ特殊ステンレス鋼) Proprietary stainless steel alloy series including dual-phase and super dual-phase stainless steels (YST130A/C/N/S) and YHC22 nickel-based alloy, marketed as corrosion/abrasion/seawater-resistant materials for pump and valve applications.
• After-Sales Service, Maintenance and Parts Supply Maintenance, repair, and parts supply services for installed Yokota pumps and valves across the customer base.
• Mechanical Equipment Installation and Pipework Construction Services (機械器具設置工事, 管工事) Project-based mechanical equipment installation and pipework construction services offered alongside pump and valve product sales.

Quantifiable outcome

• Egg white deaeration reduces dissolved oxygen by approximately 80%
• +3 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Scale indicators5 records

Recent moves1 record

Expansion highlights5 records

Broad incumbents

• EBARA Corporation: Major Japanese industrial machinery group with a substantial pumps business (custom process pumps, centrifugal pumps, chillers). Broad incumbent that overlaps with Yokota in process and centrifugal pumps but at much larger scale and broader product portfolio.
• KSB SE & Co. KGaA: German pumps, valves, and related service company with a global footprint. Overlaps directly with Yokota in industrial pumps, valves, and water/wastewater applications; much larger and more globally distributed.
• Sulzer: Swiss global pump and rotating equipment manufacturer with strong positions in process, centrifugal, and specialty pumps for water, wastewater, and industrial applications. Comparable product overlap with Yokota but at significantly larger global scale.
• ShinMaywa Industries: Japanese diversified manufacturer producing pumps (submersible, water treatment) as part of a broader portfolio including aircraft and special vehicles. Comparable on the pump side but significantly larger and more diversified than Yokota.
• Grundfos: Danish global pump manufacturer focused on water and heating applications. Comparable in centrifugal and process pump technology but focused on higher-volume, more standardized products versus Yokota's custom specialty positioning.
• Xylem Inc. Global water technology company providing pumps, treatment, and metering solutions for water/wastewater infrastructure. Adjacent rather than direct in Yokota's specialty slurry/seawater niche, but overlapping in municipal water and wastewater pump applications.
• Flowserve Corporation: US-based global manufacturer of pumps, valves, seals, and related flow control equipment for power, oil & gas, chemical, and water. Comparable in industrial and process pump categories where Yokota competes in FGD, steel, and chemical applications.

Direct peers

• Tsurumi Manufacturing: Japanese pump manufacturer specializing in submersible and dewatering pumps. Directly comparable as a Japan-based industrial pump maker serving construction, mining, and infrastructure with custom-engineered products, though larger in scale than Yokota.
• Teikoku Electric Manufacturing: Japanese manufacturer of canned motor pumps and specialty chemical process pumps. Directly comparable as a Japan-based niche industrial pump maker serving chemical and process industries with custom-engineered products.
• Torishima Pump Manufacturing: Japanese pump manufacturer specializing in large-scale centrifugal pumps for power plants, desalination, and water infrastructure. Closely comparable in custom-engineered large pumps for power generation, seawater, and infrastructure applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/yokota-manufacturing-co-ltd

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 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 Yokota Manufacturing