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Prepare the DS160 document. DS-160 → Read guideline → write → submit, get an 10 digit number → print a copy One 2×2 photo, passport, Zairyu card copy, passport Visa Fee → get a 12 digits receipt number Schedule an appointment with the 12 and 10 digit number
Go to the interview. Follow this web page to fill DS160, pay application fee and reserve an interview: https://www.usvisascheduling.com/en-US/
You can apply via mail if your last visa expired within 48 months. https://www.ustraveldocs.com/jp/jp-niv-visarenew.asp#how-to-apply-by-mail

For business visit (B1 Visa): Have a introduction letter from your company, proving that you need to enter USA multiple times in the future, so that you could get a 10 year VISA.
For tourist visit (B2 Visa): single or multiple entrance is decided by the officer who interviews you. He will decide basing on your condition. No special document needed.

Current proof of income, tax payments, property or business ownership, or assets.
Your travel itinerary and/or other explanation about your planned trip. (better be very detailed)
A letter from your employer detailing your position, salary, how long you have been employed, any authorized vacation, and the business purpose, if any, of your U.S. trip.
Criminal/court records pertaining to any arrest or conviction anywhere, even if you completed your sentence or were later pardoned.
latest school results, transcripts and degrees/diplomas.

February 5th (Wednesday): Visa interview. (I also mailed some supplementary material later)
March 2nd (Monday): mailed my passport to embassy.
March 6th (Friday): Visa was issued.

LS:你说我是先买飞机票还是先办签证？便宜的飞机票不能退，万一签证没办成就完了….

LZY:当然先办签证

LS:好！那旅馆啥时候订呢？

LZY:旅馆先定一个，因为办签证需要住宿信息，签证下来后再调整宾馆

LZY:一般情况下宾馆都可以提前几天取消