Catch lymphedema early,and bring peace of mind to everyday life.

We develop non-invasive diagnostic and monitoring devices using electrical impedance tomography (EIT).

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What we are after

Creating a society wherevisualization lets everyonelive as themselves
Visualize the New Self

What we value

01
Act like an owner
Own the problem alongside the user; take responsibility and see it through.
02
Act on innovation
Relentlessly explore the frontier and turn it into practical solutions.
03
Act from zero
Be unafraid of unprecedented challenges; create major change by taking the first small step.
04
Act as one
People with diverse expertise eagerly collaborate to create value that no individual could achieve alone.

About lymphedema

Lymphedema is a condition in which swelling occurs in the limbs due to impaired lymphatic flow.Beyond appearance changes, it can cause pain and heaviness, affecting quality of life and work.

Early detection and continuous observation are important, yet truly simple and non-invasive methods have been limited.

We aim to realize an EIT-based monitoring method that can be performed routinely with minimal burden.

Schematic of a leg swollen by lymphedema
Incidence after cancer treatment
20–30%1
Estimated patients in Japan
approx. 150,0002
At-risk population in Japan
790,0003

※1Chang M, 2016 / Cormier J, Cancer, 2010

※2Based on published materials from the Ministry of Health, Labour and Welfare (approx. 150,000) and an estimate by the Cancer Control Promotion Council (150,000–200,000).

※3Our estimate based on publicly available sources

Product & technology

The LT monitor Pro prototype screen

LT monitor Pro is a product for diagnosing lymphedema that images the distribution of water and protein inside the body. Bringing together medical and engineering expertise, we develop it through continuous validation in clinical settings.

We are also developing LT monitor Lite, a device for checking swelling at home.

Not approved as a medical device. This page makes no claim of efficacy or effect.
Core Technology: EIT

Electrical Impedance Tomography (EIT) is a sensing technology that images the electrical properties inside the body from signals obtained at many electrodes.It makes visible the changes inside the body that could not be seen before.By measuring weak currents and potentials, it achieves real-time visualization with no burden on the body.

TOMOCLOUD Inc. was founded based on research conducted at Chiba University Takei Laboratory.

Visit Takei Lab
MEASURERECONSTRUCT
EIT RECONSTRUCTION · REALTIME
1
Apply current
Switching between electrodes, a weak alternating current is applied to the body.
2
Measure voltage
The potential differences arising between electrodes are measured in turn, collecting the data needed for imaging.
3
Reconstruct
Through inverse-problem analysis of the signals, the impedance distribution inside the body is reconstructed as an image.

To realize medical technology that does not yet exist, we work with clinical teams and take it all the way, from algorithm and hardware R&D to productization and commercialization.

We are looking for people to build it with
A hand touching a probe to a board while watching an oscilloscope waveform
Close-up of a measurement board lined with D-sub connectors

Join us

See openings on Wantedly

From lab technology to a medical device that reaches patients. We are looking for members to take on that journey from the earliest days.

Full-time
Regulatory Affairs & Quality Assurance Lead
Building our QMS and preparing the documentation for regulatory submission.
LinkedIn
Full-time
R&D Lead
Implementing image reconstruction algorithms, and designing and evaluating the device.
JREC-IN Portal
Full-time
Circuit Design Engineer
Designing measurement circuits, and implementing and evaluating the boards.
HiPro Direct

A request for your input

As we develop LT monitor Lite, our device for use at home, we are asking about the difficulties you face day to day and the features you feel would help. Responses are aggregated anonymously and used for nothing but improving the product.

Answer the survey

Team

From the founder

Ryoma Ogawa

From unseen anxiety to visible reassurance.

While doing research in the faculty of engineering, I have been visiting hospital wards since my student days, listening to patients and clinicians.

What I felt there again and again was the anxiety of not being able to see the state of one's own body.

I wanted to make changes in the body easier to understand and closer at hand.

Starting from that wish, we work with clinical teams to develop new sensing technology through the power of engineering.

Finding problems together with the clinical front line, and solving them together. That is where our making begins.

CEO / FOUNDERRyoma Ogawa
Japan Science and Technology Agency (JST)GTIEJapan Agency for Medical Research and Development (AMED)New Energy and Industrial Technology Development Organization (NEDO)

As a startup born out of Chiba University, we work to bring research results into society.We have built the business with the support of a range of public agencies.

Contact

For joint research, press inquiries, or hiring, please reach us here.

+81-43-290-3105
info@tomocloud.co.jp
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Company

Company
TOMOCLOUD Inc.
Business
Development and sales of non-invasive bio-imaging devices
Founded
Aug 18, 2025
Representative
Ryoma Ogawa
Address
263-0022 Room 307, Chiba University Knowledge-based Collaborative Research Center (KCRC), 1-33 Yayoi-cho, Inage-ku, Chiba, Japan