Do I require a visa to enter Japan?
A visitor who wish to enter Japan for short-term stay, must obtain a Temporary Visitor's visa prior to departing for Japan, except nationals and citizens of countries and regions with reciprocal visa exemption arrangements with Japan for the purposes of tourism, visiting friends/relatives, business, attending a conference and/or other unpaid activities only.
Singapore citizens do not require a visa to enter Japan for temporary visits less than 90 days for any of the purposes listed above.
For cases involving paid activities or staying beyond the period allowed, a visa is required. Information and guidelines on application for work and long-term visas are available here.