Our Vision

Humanity and Water. We are a challenge to its future.
Since prehistoric times,humanity has searched for,strugged with and lived with water.
To free humanity from the confinement of water,to enable everyone to use water anywhere,is to realize the ultimate freedom in human history.
This is the future we aim for at HOTARU.

Our Concept

A new alternative to
the existing large-scale water & wastewater infrastructure that anyone, anywhere can own.

 

CORE TECH: RAINBOX

Sensors and algorithms are at the heart of the personal water recycling system "RAINBOX" we developed.
It purifies more than 90% of used wastewater to clean water on-site.

Use Water Anywhere

RAINBOX optimizes the water purification process for each use.
Whether the indoors or the outdoors, water in small quantities can be reused safely and continuously.

Network of Decentralized System

From water treatment dependent on operator experience to big data collected from a network of decentralized water systems.

Process Optimized by Data Analysis

Gathered data provides insight for hardware/software improvement.
Lower costs and increased safety from process optimization & development of new filters.

 

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Hotaru Co.

113-0033
3-40-3,HONGO, BUNKYO, TOKYO, JAPAN