# B dot Medical

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/b-dot-medical

- Industry: Medical Devices & Equipment
- Headquarters: Tokyo, Japan
- Website: https://bdotmed.co.jp
- Total disclosed funding: $14M
- Latest round: Series B (Mar 31, 2023)
- Investors on record: 8

## About

Founded in 2017 and based in Tokyo, Japan, B dot Medical Inc., formerly part of the National Institute of Radiological Sciences, operates as a manufacturer and supplier of proton beam cancer treatment devices. In 2019, the company obtained its Medical Device Manufacturing Registration business license, and in 2020, it obtained a business license for first-class medical device manufacturing and sales business. In October 2025,?B dot Medical Inc.?raised JPY 1.3 billion ?in?venture funding ?from new investor FUNDINNO.

The company's main businesses include the manufacture and sale of proton beam cancer treatment equipment, as well as research, development, and provision of particle beam cancer treatment.

The company plans to use its proceeds from October 2025 funding toward the development of a compact proton therapy device for cancer treatment.

## Funding rounds

- Series B, Mar 31, 2023, $0.8M — Mitsubishi UFJ Capital
- Series B, Mar 14, 2023, $5.2M — Pegasus Tech Ventures, Japanet Holdings
- Series A, Feb 25, 2022, $1.7M — Mitsubishi UFJ Capital
- Series A, Feb 2, 2021, $6.6M — JA Mitsui Leasing, Keio Innovation Initiative, NICHICON CORPORATION, Mediark, Cosylab d.d.

## Investors

- JA Mitsui Leasing — Series A
- Keio Innovation Initiative (https://capitalatlas.ai/funds/keio-innovation-initiative) — Series A
- NICHICON CORPORATION — Series A
- Mediark — Series A
- Cosylab d.d. — Series A
- Mitsubishi UFJ Capital (https://capitalatlas.ai/funds/mitsubishi-ufj-capital) — Series A, Series B
- Pegasus Tech Ventures (https://capitalatlas.ai/funds/pegasus-tech-ventures) — Series B
- Japanet Holdings — Series B