HotJet

What HotJet does

HotJet (株式会社HotJet) is a Japanese private manufacturing company founded in February 2018 and headquartered in Amagasaki City, Hyogo Prefecture. The company develops and commercializes the HOTJET, a subcritical water cleaning machine that heats water to 140°C under pressure, creating a subcritical state with chemical properties not found in ordinary water (combined acidic and alkaline hydrolysis behavior, alcohol-like solvency). This subcritical water is delivered through a proprietary bubble/cavitation nozzle whose bubble-collapse shock waves mechanically strip contaminants, enabling removal of organic contaminants, oil deposits, and coatings without chemical detergents or solvents. The technology consumes approximately one-third the water of conventional high-pressure washers, and most injected water evaporates, sharply reducing drainage treatment requirements.

The business model combines hardware sales of the HOTJET machine, professional cleaning and coating removal services performed by HotJet using the system, and ancillary sales of functional coatings as a complementary offering. Go-to-market is direct-to-customer through the corporate website with inquiry forms, supplemented by video content demonstrating applications and channel partnerships with BK通商 for sales cooperation and E-TEC for construction/implementation services. Target customers are industrial equipment operators — factories and manufacturing facilities with heavy machinery maintenance needs where conventional high-pressure or warm-water washers fail to remove persistent oil contamination and coatings. Pricing is not publicly disclosed and is handled via direct inquiry, consistent with low-volume, custom-engineered industrial sales.

The company is founder-controlled and small-scale: registered capital is ¥4.1 million (~$28K USD), with no disclosed external institutional or PE investment. Leadership comprises Representative Director Yasuo Kamitsuji (an administrative scrivener since 1995), advisor Dr. Yuzuru Ashida (former Kyoto University professor emeritus with a background in petroleum resource development), and two directors with backgrounds in civil engineering/construction (Sato Kogyo) and petroleum trading (Cosmo Oil Cosmo Trade & Service). HotJet's public positioning is built around environmental alignment with UN SDGs 3, 6, 9 and 12, framing its chemical-free, low-water cleaning technology as a regulatory-friendly alternative to solvent-based industrial cleaning.

Name

HotJet

Legal name

株式会社HotJet

Website

https://hot-jet.com

Company type

Private

Founded year

2018

Operating status

Operating

Short description

HotJet is a Japanese private manufacturer that develops and sells the HOTJET subcritical water cleaning machine, which uses 140°C pressurized water and cavitation nozzles to remove industrial oil contamination and coatings without chemicals. It sells equipment, cleaning services, and functional coatings to factories and industrial operators.

Ownership category

akta.pro rank

Product category

Industrial Cleaning Equipment

NAICS

Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Commercial and Service Industry Machinery Manufacturing (33331)

SIC

Special Industry Machinery (No Metalworking Machinery) (3550)

akta.pro primary industry

Steam Cleaning & Sanitization Equipment (IMAHALAE)

akta.pro secondary industries

Industrial & Manufacturing Facility Cleaning (IMAIADAB), Specialty Deep Cleaning (Duct/Kitchen Exhaust/Pressure Washing) (IMAIADAN)

Keywords

• Industrial cleaning equipment
• Subcritical water cleaning
• Solvent-free coating removal
• Chemical-free industrial washers
• Water-based cleaning machines

Headquarters

HQ city

Amagasaki

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. HOTJET Equipment Sales: Sale of subcritical water generation device 'HOTJET' - the core product line of the company.
2. Cleaning and Coating Removal Services: Provides cleaning and coating removal services using the HOTJET subcritical water system.
3. Functional Paint Sales: Sale of functional coatings as a complementary product to the cleaning service offerings.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

HotJet designs, manufactures, and sells the HOTJET subcritical water cleaning machine (亜臨界水生成装置), which heats water to 140°C under pressure to create a subcritical state that decomposes organic contaminants through hydrolysis and cavitation, eliminating the need for chemical detergents or solvents. The company also performs cleaning and coating removal services using this equipment and supplies complementary functional coatings (機能性塗料) for industrial customers seeking solvent-free maintenance of machinery parts and equipment.

Product overview

HotJet offers a unified product ecosystem centered on the HOTJET subcritical water generation device. The core product is the HOTJET cleaning machine, which uses heated subcritical water (140°C under pressure) to clean surfaces and remove coatings without chemical solvents. This core device is complemented by HOTJET cleaning and coating removal services performed by the company, as well as functional coatings (功能性涂料) sold alongside the device. The portfolio enables industrial and commercial customers to perform solvent-free cleaning, coating removal, and surface treatment using a single technology platform.

Differentiator

Problem solved

Functional benefit

Brands

• HOTJET: Subcritical water generation device that cleans and strips organic matter without chemical solvents. Uses water heated above 100°C under pressure to generate hydrolysis and penetration effects.

Products and services

• HOTJET Subcritical Water Generation Device (亜臨界水生成装置) A cleaning machine that heats water to 140°C while applying pressure to create a subcritical state, enabling solvent-free cleaning and coating removal of organic contaminants through hydrolysis and penetration effects. Designed for industrial operators that cannot remove stubborn oil and coating residues with conventional high-pressure or warm water washers.
• HOTJET Cleaning and Coating Removal Service (HOTJET洗浄・塗膜剥離サービス) Cleaning and coating removal services performed by HotJet using its HOTJET subcritical water generation device, targeting stubborn oil deposits on machinery parts and industrial equipment at customer sites.
• Functional Coatings (機能性塗料) Functional coatings sold as a complementary product alongside the HOTJET cleaning machines and services, supporting surface treatment applications.

Quantifiable outcome

• Water consumption reduced to approximately 1/3 of conventional high-pressure washers
• +2 more outcomes

Segments1 record

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered minor.

• BK通商minorChannel Partner/ Reseller/ DistributorSales cooperation partner for HOTJET products. Listed in the sales and construction cooperation companies section of the HotJet website, suggesting they help expand market reach and customer acquisition for the subcritical water cleaning technology.
• E-TECminorImplementation/ SI/ Consulting PartnerConstruction cooperation partner supporting service delivery for HOTJET cleaning applications. Listed alongside BK通商 in the sales and construction cooperation companies section, assisting with implementation and on-site cleaning/coating removal services.

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Direct peers

• Nilfisk: Danish manufacturer of industrial and commercial cleaning equipment including high-pressure washers, scrubbers, and vacuum systems. Competes head-to-head with HotJet in industrial parts washing and degreasing, serving factories and maintenance contractors with established dealer networks.
• Aquajet Systems: Manufacturer of hydrodemolition and high-pressure water jetting robots/systems for industrial surface preparation and coating removal. Competes with HOTJET in the industrial coating-removal use case, though relies on high pressure rather than subcritical temperature chemistry.
• Cleaning Technologies Group: US-based provider of industrial parts washing and cleaning systems (immersion, spray, ultrasonic) for manufacturers. Comparable to HOTJET in targeting industrial parts degreasing/cleaning, with broader technology portfolio and larger installed base in North American manufacturing.
• Hammelmann: German specialist in high-pressure water jetting and industrial cleaning pumps and systems up to very high pressures. A direct substitute for HOTJET in industrial surface cleaning and coating removal, especially in heavy industry, petrochemical, and shipyards.
• ELMA Ultrasonic: German maker of ultrasonic and aqueous industrial cleaning systems for precision parts and manufacturing. Targets the same industrial parts-cleaning pain point HotJet addresses, offering an alternative chemistry-free cleaning approach via ultrasonic cavitation in water.
• Surdry: Spanish manufacturer of industrial steam cleaning and sanitization equipment for food, automotive, and industrial facilities. Closest analogue to HOTJET's high-temperature cleaning concept, particularly where steam cleaning is used for degreasing and surface prep.

Broad incumbents

• Rösler Oberflächentechnik: Global manufacturer of mass finishing, shot blasting, and surface treatment equipment, with cleaning and degreasing solutions in its portfolio. Larger incumbent that competes for the same industrial surface treatment budget as HotJet, though typically with different cleaning mechanisms.
• Kärcher: Global market leader in cleaning equipment (high-pressure washers, steam cleaners, industrial cleaning systems). Directly competes with HOTJET in industrial cleaning use cases but at much larger scale and broader portfolio, with global service and distribution infrastructure HotJet lacks.

Market position

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 HotJet