Masayoshi Son Eyes $300 Billion US-Japan Sovereign Wealth Fund for Tech and Infrastructure

SoftBank founder Masayoshi Son is reportedly spearheading an ambitious plan to establish a joint sovereign wealth fund (SWF) between the United States and Japan. According to the Financial Times, the fund would focus on large-scale investments in infrastructure and technology, with an initial capital target of around $300 billion.

A Strategic Proposal

Though not formally submitted, the proposal has reportedly been discussed with US Treasury Secretary Scott Bessent. If implemented, the joint fund would be co-owned and operated by the US Treasury and Japan’s Ministry of Finance, each holding a significant stake. The structure could also allow limited partner investors to participate—possibly opening the door to retail investors in both countries.

Sources suggest the proposed fund would leverage its capital for larger strategic investments, potentially reshaping global financial partnerships in emerging technologies and infrastructure development.

Why Now?

The proposal comes at a crucial time as the US Treasury explores alternative revenue streams that don’t involve increasing taxes. Secretary Bessent is reportedly open to innovative funding strategies, making Son’s idea a timely and appealing option.

Neither SoftBank nor the US Treasury has officially commented on the proposal.

SoftBank's Financial Turnaround

The news arrives amid a strong rebound for SoftBank Group Corp., which reported a 124% surge in quarterly profits, buoyed by rising valuations in key tech startups including ByteDance and OpenAI.

For the fiscal fourth quarter, SoftBank recorded a net income of ¥517.18 billion ($3.5 billion). Its Vision Fund—known for high-profile tech investments—returned to profitability with a gain of ¥26.1 billion, thanks to the performance of investee companies like ByteDance and China’s Didi Global Inc.

For the full fiscal year ending March, SoftBank posted a net income of ¥1.15 trillion, marking its first annual profit in four years. This dramatic turnaround follows a ¥228 billion loss in the previous fiscal year, driven by market volatility and tech sector headwinds.

A New Chapter for Global Investment?

Masayoshi Son’s sovereign wealth fund proposal could signal a new chapter in US-Japan economic cooperation. If realized, the fund would represent one of the largest bi-national investment vehicles in modern history, potentially transforming the landscape of global tech and infrastructure financing.

Stay tuned as this high-stakes initiative continues to unfold.