# Tsubame BHB funding: rounds and investors

> Tsubame BHB has raised $35M across 1 round since 2024. Investors include Mitsubishi UFJ Capital. Every round with its source.

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

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

# Who invested in *Tsubame BHB*

One round we have observed, with the one investor named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

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Energy

Funding summary Updated 27 Oct 2026

**$35M** raised across 1 round since 2024, from 1 source

- **Latest round:** Series C, $35M Feb 2024
- **Investors:** 1

See who backed them

## The rounds

- **Feb 2024** Series C **$35M** [Mitsubishi UFJ Capital](https://millionrounds.com/fund/mitsubishi-ufj-capital-co-ltd) Source recorded

## Everyone who backed them

[Mitsubishi UFJ Capital](https://millionrounds.com/fund/mitsubishi-ufj-capital-co-ltd) VC firm **1** round

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

## Also claim to have backed them

This firm lists Tsubame BHB as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.

[I-Nest Capital](https://millionrounds.com/fund/i-nest-capital) VC firm Per its own site

## Quick answers about Tsubame BHB

### Who invested in Tsubame BHB?

Tsubame BHB's investors include Mitsubishi UFJ Capital.

### How much has Tsubame BHB raised?

Tsubame BHB has raised $35M across 1 round since 2024.

### When did Tsubame BHB last raise?

Tsubame BHB's most recent round was a Series C of $35M in Feb 2024.

### What was Tsubame BHB's biggest round?

Its most recent round, $35M in Feb 2024, is also its largest on record.

### Who backed Tsubame BHB first?

Tsubame BHB's first round on record, in Feb 2024, was backed by Mitsubishi UFJ Capital.

### What stage is Tsubame BHB at?

Tsubame BHB's latest named round is a Series C, in Feb 2024.

### Where is Tsubame BHB based?

Tsubame BHB is based in Japan.

## Companies like Tsubame BHB

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

[**Helical Fusion** $43M · Oct 2026](https://millionrounds.com/company/helical-fusion)[**Tensor Energy** $6.7M · Apr 2026](https://millionrounds.com/company/tensor-energy)[**Sharing Energy** $26M · Apr 2026](https://millionrounds.com/company/sharing-energy)[**3DC** $2.4M · Feb 2026](https://millionrounds.com/company/3dc)[**Oceanic Constellations, Inc** $13M · Feb 2026](https://millionrounds.com/company/oceanic-constellations-inc)[**Carbon CryoCapture** $404K · Sept 2025](https://millionrounds.com/company/carbon-cryocapture)

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