MiRESSO

Aomori, Japan

Miresso develops and commercializes beryllium, a material necessary for nuclear fusion energy, using a low-temperature purification technology

Education Industrial & Manufacturing

MiRESSO, based in Aomori, Japan, has 6 investors on file, among them Global Brain, Keio Innovation Initiative and Mitsui Sumitomo Insurance Capital. Its latest round on record is Series A, 7 Aug 2025. Its site was last checked 12 Nov 2026: site answers.

miresso.co.jp

Funding

1 round on record

Latest roundSeries A7 Aug 2025

Since that round1 year 3 monthsno later round on record

Investors in its rounds3none with a VCinfo profile yet

Aug 2025Series ALed by Spiral Capital, with 2 others

Round sizes and total raised are on Fundup AI, our sister product for funding data.

Investors

6 investors on file

Investor	Evidence	Type
Global Brain	Portfolio page	Venture capital
Keio Innovation Initiative	Portfolio page	Venture capital
Mitsui Sumitomo Insurance Capital	Portfolio page	Corporate VC
MPower Partners	Portfolio page	Venture capital
NTT DOCOMO Ventures	Portfolio page	Corporate VC
Spiral Capital	Portfolio page	Venture capital

A company is shown only after its own site answers and carries its name. Sites are checked again on a schedule, because domains lapse and get bought. Round stages and dates come from Fundup AI; investor links come from portfolio pages and rounds; other facts name their source when you point at them. How we grade the data

At a glance

Latest round: Series A, 7 Aug 2025
Investors on file: 6
Founded: 2023
Employees: 11-50
Headquarters: Aomori, Japan
Site: Answers
Last checked: 12 Nov 2026

Company data by Fundup AI.

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GET /v1/companies/miresso.co.jp/investors
GET /v1/companies/miresso.co.jp/news

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VCinfo API

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GET /v1/companies/miresso.co.jp
GET /v1/companies/miresso.co.jp/news

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