In 1924, due to the letter from Masanao HANIHARA, the U.S. Congress took on a hostile attitude toward Japanese, and the Immigration Act, 1924 (Japanese Exclusion Act) passed in May, and officially after July 1st, though in reality from June 24th onwards, Japanese immigration was totally banned and those who arrived in San Francisco Harbor on the 'Siberia' were the last Japanese immigrants to the U.S.
1924年埴原正直駐米大使の書簡により連邦議会が排日に傾き、5月の合衆国移民法1924（排日移民法）成立により、正式には7月1日以降、実質的には6月24日、移民船「シベリア丸」でサンフランシスコ港に到着した移民を最後に日本人の移民が全面的に禁止される。