19-year-old superstar-in-waiting Neymar opened the scoring in the 19th minute with a superb looping left foot shot. The genuinely two-footed player was sensational in the opening half, linking well with his team-mates and showing some amazing dribbling skills. Reysol resorted to crude fouling to try and contain the young tyro.
Five minutes later Borges rifled home a great second goal for Santos from just outside the area and it looked as if Kashiwa would be overwhelmed. To their credit, the Japanese side regrouped in the second half and got back in the match with a headed goal by Hiroki Sakai from a corner by Wagner.
Santos' third was another spectacular strike, this time from a free kick by Danilo, that he expertly bent around the wall. Danilo, who can play in defence or midfield will be joining Porto after the tournament and should make a big impression in Europe.
The team in yellow refused to buckle, however, and came close to a reply from Masakatsu Saka, who spurned two great chances created down the left of Santos' defence.
The 30,000 strong crowd, who braved a cold evening in Nagoya, left happily after witnessing a fine match full of attacking play by both sides.
Santos go on to the final in Yokohama on Sunday where they will expect to face European Champions and holders Barcelona.