NewHeart Watanabe International Hospital

What NewHeart Watanabe International Hospital does

NewHeart Watanabe International Hospital (ニューハート・ワタナベ国際病院) is a private specialty cardiac surgery hospital located in Tokyo's Suginami ward (Hamadayama), Japan. Founded in 2014 by Director Dr. Go Watanabe under the umbrella of Medical Corporation Tokyo Ishinkai (東京医心会), the hospital specializes in cardiovascular surgery and cardiovascular medicine, with a clinical concentration on minimally invasive and robot-assisted cardiac procedures. It is the only facility in Japan performing Da Vinci robotic keyhole (キーホール) cardiac surgery, and has ranked #1 worldwide in robotic cardiac surgery case volume for six consecutive years from 2019 through 2024, accumulating 2,421 robotic cases under Team Watanabe between December 2005 and May 2026. Approximately 500 patients receive surgery at the hospital annually, and the facility serves roughly 1 in 29 of all mitral valve repair patients in Japan (per 2018 Japan Chest Surgery Society data).

The hospital's clinical portfolio centers on robot-assisted and minimally invasive cardiac procedures: Da Vinci mitral valve repair (over 1,800 cases 2005-2026), MICS Bentall aortic root replacement, MICS ascending aortic replacement, TAVI, MitraClip, NeoChord beating-heart mitral repair, and the proprietary Wolfe-Ootsuka method for atrial fibrillation (approximately 2,000 cases since 2008, now insured under K594-4 since April 2022). Beyond surgery, the hospital runs free email and LINE pre-consultation services, paid second opinion consultations (¥22,000 in-person / ¥27,500 online for 30 minutes), online video consultations through Medley's CLINICS platform, an Apple Watch ECG intake service, and — as of October 30, 2025 — the 'AI NewHeart' generative AI chatbot. In June 2024 it transitioned inpatient billing to Japan's DPC comprehensive payment system, and a Low-Invasive Adult Congenital Heart Disease Surgery Center is scheduled to launch in April 2026 under Professor Shingo Kasahara (Okayama University).

Revenue is generated principally through Japan National Health Insurance-reimbursed cardiac surgery (supplemented by self-pay private room upgrades under 特別療養環境室料), outpatient cardiology consultations, second opinion fees, online consultations via CLINICS, and a long tail of medical certificate and document services. The hospital markets through a multilingual website (Japanese, English, Chinese, Arabic), social channels (Twitter/X, Facebook, YouTube, Instagram, LINE), free 24-hour email consultation, webinars, public seminars, and direct physician outreach. Patient acquisition emphasizes 'one-stop treatment' in which the surgical date is decided on the initial visit. No external investors, M&A activity, or public-market listing are disclosed; the entity operates as a privately held medical corporation under direct founder/physician leadership.

Name

NewHeart Watanabe International Hospital

Legal name

ニューハート・ワタナベ国際病院

Website

https://newheart.jp

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

101–250 employees

Short description

Tokyo-based private specialty cardiac hospital founded in 2014 by Dr. Go Watanabe, performing Da Vinci robotic keyhole and minimally invasive cardiac surgery. The only facility in Japan offering robotic keyhole cardiac surgery and ranked world #1 in robotic surgical volume from 2019 to 2024.

Ownership category

akta.pro rank

Product category

Cardiac Surgery Specialty Hospital Services

NAICS

Specialty (except Psychiatric and Substance Abuse) Hospitals (622310), Specialty (except Psychiatric and Substance Abuse) Hospitals (6223), Offices of Physicians (62111)

SIC

Services-Hospitals (8060), Services-Health Services (8000)

akta.pro primary industry

Cardiac & Cardiothoracic Specialty Hospitals (HLAFAHAA)

akta.pro secondary industries

Interventional Cardiology (PCI/Structural Heart) (HLAKABAB), Cardiovascular / Cath Lab & Electrophysiology Centers (HLAFAIAI), General Cardiology (Consultative) (HLAKABAA)

Keywords

• Cardiac surgery services
• Robotic heart surgery
• Minimally invasive cardiac procedures
• Heart valve repair
• Cardiovascular hospital care

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Cardiac Surgery Services: Revenue from robotic and minimally invasive cardiac surgeries including mitral valve repair/replacement, atrial septal defect closure, coronary artery bypass, aortic valve procedures, and arrhythmia treatments.
2. Outpatient Consultations: Revenue from outpatient clinic consultations, including first visits, follow-ups, and specialized consultations (e.g., Apple Watch ECG clinic).
3. Hospitalization and Inpatient Care: Revenue from hospital room charges, medical services during hospitalization, and related care.
4. Second Opinion Consultations: Paid second opinion services (22,000 yen for 30 minutes in-person; 27,500 yen online), providing expert cardiac surgery opinions.
5. Medical Certificate and Document Services: Fees for various medical certificates, diagnostic documents, and insurance-related paperwork.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

NewHeart Watanabe International Hospital is a single-site cardiac surgery specialty hospital providing Da Vinci robotic keyhole cardiac surgery and a comprehensive range of minimally invasive cardiovascular procedures, including mitral valve repair, atrial septal defect closure, TAVI, catheter ablation, NeoChord, MitraClip, and Wolf-Ootsuka thoracoscopic left atrial appendage closure. The hospital also provides outpatient consultations, online medical consultations via CLINICS, a generative AI chatbot (AI NewHeart), and self-pay second opinion services for adult cardiac patients in Japan and internationally.

Product overview

NewHeart Watanabe International Hospital operates as a single-facility cardiac surgery specialty hospital offering a unified set of surgical and medical services centered on minimally invasive and robotic cardiac surgery. The hospital's core offering is Da Vinci robotic keyhole (キーホール) cardiac surgery — the only facility in Japan performing this procedure — supplemented by a range of surgical treatments (MICS, TAVI, catheter ablation, NeoChord, thoracoscopic left atrial appendage closure), online consultation services via CLINICS, a free AI chatbot ('AIニューハート') launched in October 2025, and traditional patient consultation channels (free email/LINE inquiry, second opinion services). The hospital does not operate a modular software platform; its 'products' are clinical service lines and patient-facing digital consultation tools.

Differentiator

Problem solved

Functional benefit

Products and services

• Da Vinci Keyhole Cardiac Surgery (ダビンチキーホール心臓手術)
• Mitral Valve Repair (Mitral + Tricuspid Valve Repair) (僧帽弁形成術)
• Transcatheter Aortic Valve Implantation - TAVI (経カテーテル大動脈弁留置術)
• Catheter Ablation (カテーテルアブレーション治療)
• Thoracoscopic Left Atrial Appendage Closure - Wolf-Ootsuka Method (胸腔鏡下外科的左心耳閉鎖術 / ウルフ-オオツカ法)
• NeoChord Beating-Heart Mitral Valve Repair (心拍動下僧帽弁形成術 NeoChord)
• MitraClip - Percutaneous Mitral Valve Edge-to-Edge Repair (経皮的僧帽弁クリップ術)
• Minimally Invasive Cardiac Surgery - MICS (MICS 小切開心臓手術)
• Robotic Thyroid Cancer Surgery (甲状腺がんロボット手術)
• Online Medical Consultation (オンライン診療)
• AI NewHeart Chatbot (AIニューハート)
• Apple Watch Outpatient Clinic (Apple Watch外来)
• Free Email/LINE Consultation (無料メール相談・LINE相談)
• Second Opinion Consultation (セカンドオピニオン)
• Adult Congenital Heart Disease Surgery Center (低侵襲成人先天性心臓病手術センター)

Quantifiable outcome

• Next-day walking ability after robotic cardiac surgery
• +2 more outcomes

Named customers1 record

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

AI capability2 records

Feature6 records

Partnerships

One partnership is on record.

• Intuitive Surgical (ダビンチ)coreTechnology or IntegrationThe hospital uses Intuitive Surgical's Da Vinci robotic surgical system for all robotic cardiac procedures. As a proctoring facility, they train other surgeons on Da Vinci cardiac surgery techniques.

Scale indicators4 records

Recent moves6 records

Expansion highlights7 records

Broad incumbents

• Cedars-Sinai Smidt Heart Institute: US-based comprehensive cardiovascular institute with robotic cardiac surgery and TAVI capabilities within a larger hospital network. Comparable as a broad-incumbent academic cardiovascular program.
• Cleveland Clinic Heart, Vascular & Thoracic Institute: Global benchmark cardiovascular program within a large US health system, performing the full spectrum of robotic and minimally invasive cardiac surgery. Comparable as a broader-incumbent benchmark on reputation, volume and outcomes reporting.

Regional players

• Gleneagles Hospital Singapore: Singapore private hospital with a strong cardiac surgery and interventional cardiology offering catering to ASEAN medical travelers. Comparable as a regional referral destination for cardiac procedures.
• Mount Elizabeth Hospital (Singapore): Major private tertiary hospital in Singapore with a well-developed cardiac surgery and TAVI program serving regional and international patients. Comparable as a regional medical-travel hub for complex cardiac care.
• Bumrungrad International Hospital: Large Bangkok-based international hospital serving medical travelers, including structural heart and cardiac surgery. Comparable as a regional player for inbound cardiac patients from East Asia/Middle East.

Direct peers

• National Cerebral and Cardiovascular Center: Japan's national specialty hospital dedicated to cardiovascular disease, providing advanced cardiac surgery, structural heart interventions and research. Comparable as a specialty cardiovascular provider with strong referral pipeline and clinical trials capability.
• Asian Heart Institute: Standalone specialty cardiac hospital in Mumbai, India performing high-volume bypass and minimally invasive surgery. Comparable as a single-focus cardiac specialty hospital with strong brand and inbound patient flow.
• Sakakibara Heart Institute: Tokyo-based cardiac specialty hospital performing high-volume cardiovascular surgery, including minimally invasive and structural heart procedures. Most direct domestic comparable given shared geography, specialty focus and complex case mix.
• Tokyo Women's Medical University Hospital Cardiovascular Surgery: Tokyo academic medical center with a high-volume cardiovascular surgery department performing minimally invasive and structural heart procedures. Comparable as a domestic academic-peer cardiac surgery program.
• Juntendo University Hospital Cardiovascular Center: Tokyo academic cardiovascular center performing Da Vinci-assisted cardiac surgery, TAVI, and structural heart interventions. Direct domestic overlap on procedure mix and Da Vinci utilization.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/newheartW
• YouTubeyoutube.com/user/NewHeartWatanabe
• Facebookfacebook.com/newheartW
• Instagraminstagram.com/newheart.watanabe

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

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 NewHeart Watanabe International Hospital