Make business appointments as far in advance as possible. Punctuality is very important in Japan. Be sure to allow ample time between appointments. The decision process can be a very slow procedure in Japan. Workers at all levels of a company contribute input.
Patience is a virtue.
Once a decision is made, however, the implementation is immediate. Periods of silence may occur during a business meeting. Silence may indicate that the Japanese have not come to a decision and are thinking. Or it may mean that something has been done that displeases them. Be patient and allow them to speak first.