Why WOTA exist

Unlock the potential
of water in our life.

Reduce the environmental load of water usage.
Through new water technology developments,
WOTA will achieve both water freedom
and environmental responsibility,
leading to a more creative and sustainable way of life.

WOTA’s Master Plan



WOTA BOX is a portable water reuse plant.
Access water even where there is no water supply.
Safely use water anytime and anywhere,
during disasters or in the wilderness,
by reusing 98% of waste water
from showers, handwashing, and laundry.
Built with WOTA's unique technology,
developed through our intense focus on water.

Learn more


WOSH is an entirely new, water reuse hand-wash stand,
which can be set up in places without any water supply system.
All it requires are a power outlet and 20L of water.
Designed with WOTA's core technology,
developed through our intense focus on water.

Learn more
03 Project


BB.univ. is a complimentary, open online school
and BCP organized by WOTA.
BB univ. is aiming to solve and update practical issues
of disaster prevention and BCP, and has been delivered
to over 500 local governments in Japan.
This is a medium to long-term curriculum that
provides lectures on disaster prevention and BCP,
from theory to practice, in streaming video format.


  • Company Name


  • CEO

    Yosuke Maeda

  • Location

    1-13-13 Nihonbashi-bakurocho, Chuo-ku, Tokyo

  • Date of Establishment

    October 24, 2014

  • Capital

    100 million yen (Legal capital surplus included)

  • Number of Employees

    55(as of July 1, 2021)

  • Business overview

    Development of the small-scale, decentralized water recycling system
    Development of an autonomous control system for water treatment

  • Shareholders

    Board member, SoftBank Corp., Electric Power Development Co.,Ltd., Toyoda Gosei Co., Ltd., Mistletoe Japan, Inc., and others

  • Main Financing Banks

    Sumitomo Mitsui Banking Corporation, Shinjuku West Exit Branch
    MUFG Bank, Hongo Branch
    Mizuho Bank, Tokyo Chuo Branch

  • Audit corporation

    Ernst & Young ShinNihon LLC

  • Legal counsel


  • Joint Research Partners

    University of Tokyo
    Kobe University
    Japan Aerospace Exploration Agency

  • Fiscal year end



For questions or consultation,
please contact us here.