According to online reports, according to the British Financial Times, three people familiar with the matter revealed that Softbank CEO Masayoshi Son recently proposed the idea of establishing a joint US-Japan sovereign wealth fund, aiming to make large-scale investments in U.S. technology and infrastructure. The proposal has been discussed at the highest political level in the two countries and may serve as a model for other governments to deepen investment cooperation with the United States. Under the proposed structure, the U.S. Treasury and Japan's Ministry of Finance would serve as co-owners and operators of the fund, each holding a significant stake, which would then be opened to other limited partnership investors, and could allow ordinary people in the United States and Japan to subscribe for shares. People familiar with the matter said that in order to achieve investment goals, the fund size needs to reach a "huge" level-an initial capital may be US$300 billion, and subsequently operated through high leverage.