Kashiwa claim Super Cup title
Kashiwa came under pressure early on, facing the first four shots on goal, but Jorge Wagner found the net in the 26th minute against the run of play with a long-range strike.
Leandro doubled the lead in the 43rd minute after FC Tokyo's Masato Morishige pulled Hideaki Kitajima down in the area. FC Tokyo pulled one back midway through the second half with a close-range header by midfielder Ariajasuru Hasegawa.
Substitute midfielder Naotake Hanyu had a couple of chances to level the match with just over ten minutes to go only to see one narrowly go wide and the other saved by goalkeeper Takanori Sugeno.
"It was a difficult game. Both teams didn't play their best. We couldn't play our game in the beginning. I'm glad that we won in the end," said Kashiwa's Brazilian coach Nelsinho.
He said the team wanted to win all the titles on offer this season. "The results will follow. I'm very happy to win the Super Cup in the beginning," he added.
Kashiwa launch their AFC Champions League campaign this week away to Thailand's Buriram United, and Nelsinho said the club were gearing up for the challenge.
"Japanese teams haven't won [the Champions League] in recent years. It is a valuable tournament in order to show Japanese football to the world," he said. "We have been preparing for the tournament... trying to get past the group round."