Ippon - full point - end of match.
Can be earned by a really good throw
where the opponent lands flat on his/hir back, by holding the opponent on
his/her back for 30 seconds, by submission of the opponent during any
point of the match or specifically in a choking or joint locking situation,
or by earning two waza-aris (described next).
Waza-ari - half point.
Can be earned when the opponent is thrown, but
doesn't quite land flat or lands without much impact flat on his/her back.
Can also be earned by holding the opponent down for 25-29 seconds.
Yuukou - quarter point.
Can be earned when the opponent is thrown and lands
on his/her side or not quite flat on his/her back. Also earned by holding
someone down for 20-24 seconds. Yukos do not add up to produce waza-aris.
Kouka - eighth point.
Can be earned when the opponent lands on his/her butt
basically. Also by holding someone for 10-19 seconds. Kokas do not add up
to produce yukos.
A person with one yuko would beat a person with any number of kokas. A
person with one waza-ari would be a person with any number of yukos. This
is the point about adding up scores. Only waza-aris can be added to earn
There are also warnings that can give your opponent points.
Hansoku Make - Disqualification
(equivalent to ippon).
Keikoku - Warning
(equivalent to waza-ari).
Chui - Caution
(equivalent to yuukou).
Shido - Note
(equivalent to kouka).
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