# OpenHeart funding: rounds and investors

> OpenHeart has raised $1.4M across 2 rounds since 2025. Investors include IVC, FFG Venture Business Partners and Mizuho Capital. Every round with its source.

Source: https://millionrounds.com/company/openheart (Millionrounds; every figure on the page links to its filing or article)

Japan · [Seed startup](https://millionrounds.com/companies)

# Who invested in *OpenHeart*

2 rounds we have observed, with the 3 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Advanced Manufacturing

Raised 6 months ago

Funding summary Updated 26 Oct 2026

**$1.4M** raised across 2 rounds since 2025, from 2 sources

- **Latest round:** Seed, $1.4M May 2026
- **Investors:** 3

See who backed them

## The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2026

**?** Venture

**$1.4M** Seed

- **First round:** Venture
- **Biggest round:** $1.4M
- **Between rounds:** 8 months

## The rounds

- **May 2026** Seed **$1.4M** *1 new* *2 returning* [Mizuho Capital](https://millionrounds.com/fund/mizuho-capital) [IVC](https://millionrounds.com/fund/ivc) [FFG Venture Business Partners](https://millionrounds.com/fund/ffg-venture-business-partners) Source recorded
- **Sept 2025** Venture **Amount undisclosed** *2 new* [IVC](https://millionrounds.com/fund/ivc) [FFG Venture Business Partners](https://millionrounds.com/fund/ffg-venture-business-partners) Source recorded

## Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

**Venture** 2025 **Seed** 2026 [IVC](https://millionrounds.com/fund/ivc) [FFG Venture Business Partners](https://millionrounds.com/fund/ffg-venture-business-partners) [Mizuho Capital](https://millionrounds.com/fund/mizuho-capital)

## Everyone who backed them

[IVC](https://millionrounds.com/fund/ivc) VC firm **2** rounds

[FFG Venture Business Partners](https://millionrounds.com/fund/ffg-venture-business-partners) VC firm **2** rounds

[Mizuho Capital](https://millionrounds.com/fund/mizuho-capital) VC firm **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=openheart).

## Quick answers about OpenHeart

### Who invested in OpenHeart?

OpenHeart's investors include IVC, FFG Venture Business Partners and Mizuho Capital.

### How much has OpenHeart raised?

OpenHeart has raised $1.4M across 2 rounds since 2025. One round did not disclose an amount, so the total is a floor.

### When did OpenHeart last raise?

OpenHeart's most recent round was a Seed of $1.4M in May 2026.

### What was OpenHeart's biggest round?

Its most recent round, $1.4M in May 2026, is also its largest on record.

### Who backed OpenHeart first?

OpenHeart's first round on record, in Sept 2025, was backed by IVC and FFG Venture Business Partners.

### What stage is OpenHeart at?

OpenHeart's latest named round is a Seed, in May 2026.

### Where is OpenHeart based?

OpenHeart is based in Japan.

## Companies like OpenHeart

In the same sector, and raised in the last eighteen months.

[**bestat** $20M · Jul 2026](https://millionrounds.com/company/bestat)[**Malme** $1.2M · Jun 2026](https://millionrounds.com/company/malme)[**Instalimb** $7.3M · May 2026](https://millionrounds.com/company/instalimb)[**Gant** $755K · Jan 2026](https://millionrounds.com/company/gant)[**MUJIN** $374M · Dec 2025](https://millionrounds.com/company/mujin)[**Polyuse** $17M · Dec 2025](https://millionrounds.com/company/polyuse)

## Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.

Open the investor searchOr these rounds in the app