Advanced Float

Why it fits

A utility-scale nuclear plant meant to be fabricated in a shipyard rather than built on land, spanning energy and manufacturing. It has an NRC pre-application docket, and the founder was Chief Nuclear Officer of TEPCO from 2014 to 2017.

Stage and round

Established 9 February 2024. Pre-seed of 100 million yen in total from Mirai Sozo Investments' Fund II, announced 20 June 2025. The company site says a seed round closed in April 2026, with no amount or investor named. On 14 September 2026 it submitted a Regulatory Engagement Plan to the NRC, a planning document, not an application. It lists a Standard Design Approval application in 2027 as a planning assumption.

Ask on the first call

1. 01Which reactor vendor will supply the ABWR nuclear island, and is anything signed? The Regulatory Engagement Plan refers only to a 'reactor-technology provider'.
2. 02How large was the April 2026 seed, who invested, and what does it fund through the planned 2027 Standard Design Approval application? What is the Series A for?
3. 03The NRC plan names the company 'or an affiliated U.S. entity' as licence applicant and owner-operator. Which is it, and is any U.S. utility or offtaker engaged?
4. 04Nikkei xTECH reported design work with Mitsui Ocean Development (MODEC) and volume production in 2032. Which shipyard and marine engineering contracts exist, and what is the schedule now?

Risks

• –The only disclosed funding amount is 100 million yen of pre-seed money, against a reference plant of about 1,350 MWe. No source opened describes how the plant would be financed.
• –No site, reactor vendor, shipyard, utility or offtaker is named on the company site or in the NRC filing.
• –The licensing path is first of a kind. The filing so far is a planning document, not an application, and says the design approval review may extend beyond eighteen months.

Could not confirm

• ?The company site says a seed round closed in April 2026. No public announcement of it was found, and no primary source gives the amount or valuation.
• ?Design work with Mitsui Ocean Development (MODEC) is reported by Nikkei xTECH (10 December 2025) but not confirmed on the company site or in the NRC filing.
• ?Mirai Sozo Investments lists a Ryohei Takahashi as managing partner. No page opened states he is the Advanced Float outside director, whose firm the company site leaves unnamed.