On May 25, according to the Financial Times, three sources revealed that SoftBank CEO Masayoshi Son recently proposed the establishment of a Japan-U.S. joint sovereign wealth fund aimed at making large-scale investments in the American technology and infrastructure sectors. This proposal has been discussed at the highest political levels of both countries and may serve as a model for other governments to deepen their investment cooperation with the United States. According to the proposed framework, the U.S. Department of the Treasury and the Japanese Ministry of Finance will act as joint owners and operators of the fund, each holding significant equity, and subsequently open it to other limited partner investors, potentially allowing the general public in the U.S. and Japan to subscribe for shares. Sources stated that to achieve the investment goals, the fund size needs to reach a 'huge' level—initial capital may be $300 billion, followed by subsequent operations through high leverage.