Universal Passports & Visas always recommends checking with your airline as requirements may change without notice.
Japan requires that citizens of foreign countries obtain a visa to enter.  The Japanese Consulate General will determine the duration of stay upon receiving an application.  The types and categories differ according to the purpose of visit, length of stay and respective arrangement with the country of the foreign national.

Tourist: Tourist visas are issued to applicants who are traveling to a foreign country to experience its culture, landmarks, and landscapes, but not to conduct any Business, Technical labor, or take up employment.
Business: Business or Commerce visas are issued to applicants visiting a foreign country for the purpose of meetings, negotiations, and/or presentations, but not to take up employment or to conduct any technical labor.