The lightweight class was a judo

Judo

is a modern martial art and combat sport created in Japan in 1882 by Jigoro Kano. Its most prominent feature is its competitive element, where the object is to either throw or takedown one's opponent to the ground, immobilize or otherwise subdue one's opponent with a grappling maneuver, or force an...

 event held as part of the Judo at the 1964 Summer Olympics

Judo at the 1964 Summer Olympics

The judo competition at the 1964 Summer Olympics was the first time the sport was included in the Summer Olympic Games. Medals were awarded in 4 classes, and competition was restricted to men only. The competition was held in the Nippon Budokan, which was built to host the competition...

 programme. The weight class was the lightest contested, and allowed judokas of up to sixty-eight kilograms. The competition was held on Tuesday, October 20, 1964.

Twenty-four judokas from eighteen nations competed.

Medalists

Elimination round

The twenty-five competitors were divided into seven pools of three and one pool of four. Each pool played a round-robin tournament, with the winner of the pool advancing to the quarterfinals. Pool D was the only one to require a playoff, which was won by Chang.

Pool A

Place	Judoka	Score	Qual.
1		2-0	QQ
2		1-1
3		0-2

Pool B

Place	Judoka	Score	Qual.
1		2-0	QQ
2		1-1
3		0-2

Pool C

Place	Judoka	Score	Qual.
1		2-0	QQ
2		1-1
3		0-2

Pool D

Place	Judoka	Score	Qual.
1		2-1	QQ
2		1-2
3		1-1

Pool E

Place	Judoka	Score	Qual.
1		3-0	QQ
2		1-2
		1-2
		1-2

Pool F

Place	Judoka	Score	Qual.
1		2-0	QQ
2		1-1
—		0-2

Stefano Gamba did not compete.

Pool G

Place	Judoka	Score	Qual.
1		2-0	QQ
2		1-1
3		0-2

Group 8

Place	Judoka	Score	Qual.
1		2-0	QQ
2		1-1
3		0-2

Knockout rounds

The remaining eight judokas competed in a single elimination bracket. Losers in the quarterfinals were placed 5-8 while both losers in the semifinals won bronze medals.