All travelers from Visa Waiver Countries, which includes Japan, who are travelling to the United States without a visa for temporary business or pleasure under 90 days are required to apply for Electronic System for Travel Authorization (ESTA). The Embassy has released, via its website and social media, a step-by-step instruction on how to apply for ESTA and avoid common pitfalls. For more information on ESTA applications, please visit this online page.
To view on YouTube: https://youtu.be/hdV38lnBmRY