Quabit

What Quabit does

Quabit Inc. (クアビット株式会社) is a Japanese for-profit biotechnology company founded on January 15, 2018 in Kawaguchi, Saitama, that develops and commercializes water purification systems based on two proprietary patented technologies which reproduce the natural water-oxidation-reset function of seafloor strata. The company applies this technology to three product lines: (1) a water purification system for ornamental fish that eliminates the need for water changes on a semi-permanent basis, (2) building-type land-based aquaculture systems that can utilize dead space such as underground areas, and (3) biotope restoration technology aimed at water systems whose ecology has collapsed. Independent verification of the underlying science was performed at the Tokyo Institute of Technology, and Quabit also conducts long-term operation experiments in-house and with partner companies.

The company operates as a private, founder-controlled entity led by Representative Director Kiyofumi Saito (齊藤清文) and Director Hiroyuki Toyama (遠山寛之), with no disclosed parent company, venture capital investors, or institutional shareholders. Its go-to-market is primarily direct sales via its bilingual corporate website (quabit.jp), with a wholly-owned US sales subsidiary, QUABIT USA LLC (New York), established on June 29, 2018 to serve the American ornamental fish market; the company also exhibited at GLOBAL PET EXPO 2018 in Orlando. Quabit has supported the UN Sustainable Development Goals in its positioning.

The capital structure shows a pattern of small, recurring equity injections rather than institutional venture rounds: five documented capital increases between April 2023 and October 2025 raised registered capital from approximately 38.225 million yen to 66.235 million yen. Pricing is not publicly disclosed, no revenue figures are available, and no named customers or select customer logos are present in the source material. The addressable customer mix is segmented across commercial aquaculture operators, ornamental fish hobbyists, and environmental restoration projects, but actual customer count, contract sizes, and revenue concentration cannot be determined from the available evidence.

Name

Quabit

Legal name

クアビット株式会社 (QUABIT Inc.)

Website

https://quabit.jp

Company type

Private

Founded year

2018

Operating status

Operating

Short description

Quabit Inc. is a Japanese biotechnology company that develops patented water purification systems reproducing seafloor oxidation-reset functions, serving ornamental fish hobbyists, land-based aquaculture operators, and environmental restoration projects in Japan and the United States.

Ownership category

akta.pro rank

Product category

Water Purification Systems

NAICS

Aquaculture (1125)

akta.pro primary industry

Water Treatment, Filtration & Recirculation (RO, UV, Sterilization) (AFAAAHAH)

Keywords

• Water purification systems
• Biotechnology equipment
• Land-based aquaculture
• Ornamental fish systems
• Biotope restoration

Headquarters

HQ city

Kawaguchi

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Distribution channels2 records

Marketing channels2 records

Core offering

QUABIT Inc. develops and manufactures biotechnology-based water purification systems that reproduce the seafloor's natural water reduction function. Its product lineup comprises a Water Purification System for Ornamental Fish, Land-Based Aquaculture Technology, and Biotope Restoration Technology. The company sells its own proprietary hardware to commercial aquaculture operators, aquarium hobbyists, and environmental restoration projects.

Product overview

QUABIT Inc. offers a unified portfolio of biotechnology-based water purification products centered on two core patented technologies that reproduce the seafloor's natural water oxidation-reset function. The main offerings include: (1) Water Purification System for Ornamental Fish - the company's flagship product enabling semi-permanent water maintenance without changes; (2) Building-Type Land-Based Aquaculture Farms - applying the technology to sustainable aquaculture in urban/dead spaces; and (3) Biotope Restoration Technology - using the technology to restore collapsed aquatic ecosystems. All products leverage the same core patented biotechnologies to create 'small seas' on land where water does not oxidize.

Differentiator

Problem solved

Functional benefit

Products and services

• Water Purification System for Ornamental Fish (観賞魚用浄水システム) A hardware water purification unit intended for ornamental fish tanks and small aquarium applications, utilizing Quabit's proprietary seafloor water-reduction biotechnology to clean water without chemicals.
• Land-Based Aquaculture Technology (ビル型陸上養殖場技術) An industrial water purification/management system designed for vertical (building-type) land-based aquaculture facilities, targeted at commercial aquaculture operators.
• Biotope Restoration Technology (生態系修復技術) A technology offering for restoring natural biotopes and ecosystems by applying Quabit's seafloor water-reduction biotechnology to improve water quality in environmental remediation projects.

Quantifiable outcome

• Semi-permanent water preservation without oxidation - water does not age in the system

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators2 records

Recent moves7 records

Expansion highlights5 records

Emerging players

• AquaBounty Technologies: AquaBounty is a land-based aquaculture company using recirculating aquaculture systems (RAS) for salmon production. It is comparable to QUABIT as an emerging player in land-based aquaculture, representing the kind of potential customer or adjacent model for QUABIT's building-type aquaculture technology.
• Pure Salmon: Pure Salmon is a global land-based salmon farming venture operating RAS facilities worldwide. It represents an emerging-player adjacency to QUABIT's land-based aquaculture technology, sharing the same underlying thesis that stable, recirculated water systems enable scalable aquaculture.

Broad incumbents

• Pentair: Pentair is a large global water-treatment and aquaculture equipment company serving both commercial aquaculture and residential aquarium markets. It is a broad incumbent that competes with QUABIT across the aquaculture side of the business as part of a much larger portfolio.
• Xylem: Xylem is a global water-technology major with products spanning utility water treatment, industrial water, and aquaculture. It represents the kind of large strategic acquirer or competitor that would intersect with QUABIT's water-purification biotechnology as it scales.

Direct peers

• EHEIM: EHEIM is a German manufacturer of aquarium filtration and water-treatment systems with deep European and global distribution. It competes with QUABIT in aquarium hardware-based water purification, with a strong brand and installed base among hobbyists.
• Fluval (Rolf C. Hagen): Fluval is a major aquarium equipment brand specializing in filtration systems for ornamental fish. It is directly comparable to QUABIT's aquarium water-purification product in both technology category and target customer.
• API (Mars Petcare / Mars Fishcare): API is one of the largest aquarium water-treatment brands globally, selling dechlorinators, biological supplements, and water conditioners through mass retail. It directly overlaps QUABIT's ornamental-fish segment in both customer base (hobbyists) and functional problem addressed (water quality maintenance).
• Seachem: Seachem is a US-based specialty chemical manufacturer of water-treatment products for ornamental aquariums. It is the most direct competitor to QUABIT's flagship ornamental-fish water-purification product, addressing the same hobbyist pain points (water quality, oxidation) through a different technical approach.
• Tetra (Spectrum Brands): Tetra is a globally distributed aquarium brand offering water-treatment products, foods, and equipment. It competes with QUABIT's ornamental-fish water-purification system at the mass-market end of the same hobbyist customer base.
• Aqua Design Amano (ADA): ADA is the leading premium planted-aquarium brand in Japan, with extensive expertise in natural-style aquatic ecosystems and water management. It is the most direct domestic Japanese peer to QUABIT's ornamental-fish and biotope positioning, serving overlapping hobbyist and ecosystem-restoration customers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat2 records

Key risks7 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

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 Quabit